Trump Targets Republican Opponents in Tuesday's Primary Elections

On December 11, 2025, twenty-one Indiana Republican state senators joined all ten Democrats to vote 31–19 against redrawing the state's congressional maps — a redistricting plan that President Donald Trump had personally championed as essential to protecting the GOP's razor-thin House majority heading into the 2026 midterms [1]. Within hours, Trump posted on Truth Social: "Every one of these people should be primaried" [3].

Five months later, that threat is being carried out. Seven of those Republican senators face Trump-endorsed challengers in Tuesday's primary elections, backed by an unprecedented flood of outside money that has transformed obscure state legislative races into a national referendum on the boundaries of presidential power within a political party [2].

The Indiana Battleground

The seven targeted incumbents — Sens. Dan Dernulc, Linda Rogers, Jim Buck, Spencer Deery, Greg Goode, Greg Walker, and Travis Holdman — share a common transgression: they prioritized what they described as Indiana's state sovereignty over the president's desire to gerrymander two Democratic-held congressional districts out of existence [4]. Jim Buck, an 18-year veteran of the state senate, and Travis Holdman, another long-serving legislator, are among those who now face challengers with little prior political experience but significant financial backing from national Republican organizations [5].

The challengers include Paula Copenhaver, an aide to Lieutenant Governor Micah Beckwith and the Fountain County Republican chair, who is running against Deery and visited the White House in early March to meet with Trump [3]. Trevor De Vries challenges Dernulc in District 1, while Dr. Brian Schmutzler, an anesthesiologist, is running against Rogers in District 11 [5].

Ad spending across the seven races has reached $11.8 million according to AdImpact — a staggering sum for state senate primaries that typically attract a fraction of that [1]. For context, Deery's previous campaign cost roughly $150,000 [3]. Trump-aligned groups have driven the spending surge: the America Leadership PAC, run by a top adviser to Donald Trump Jr. and Vice President JD Vance, has spent more than $3 million on ads, while the Club for Growth has poured approximately $2 million into mailers [3][6]. Jim Buck alone faces over $1 million in spending against him [3].

Source: AdImpact via NPR

Data as of May 5, 2026CSV

Former Indiana Governor Mitch Daniels called the outside spending "dumb," arguing it undermines state sovereignty [3]. But Trump political consultant Marty Obst confirmed that the president made redistricting "a top political priority" with "consequences and accountability" for those who defied him [3].

Beyond Indiana: A Month of Revenge

Tuesday's Indiana races are just the beginning. Trump's retribution campaign extends to federal contests later in May that carry far higher stakes.

Louisiana Senate (May 16): Sen. Bill Cassidy, one of seven Republican senators who voted to convict Trump during his second impeachment trial in 2021, faces a primary challenge from Rep. Julia Letlow, whom Trump endorsed on January 18, 2026, calling her a "true America-first patriot" [7]. An Emerson College poll shows Cassidy trailing in third place at 21%, behind state Treasurer John Fleming at 28% and Letlow at 27% [8]. A plurality of Republican primary voters — 41% — said Letlow would be most supportive of the Trump administration's agenda [8].

Kentucky's 4th Congressional District (May 19): Rep. Thomas Massie, a seven-term congressman and self-described constitutional libertarian, faces Trump-endorsed challenger Ed Gallrein, a Navy veteran and farmer [9]. Massie's offenses include opposing Trump's signature tax and spending bill and criticizing military strikes on Iran [9]. Unlike some targets, Massie has seen a fundraising boost from Trump's attacks, drawing support from voters who see him as an independent voice [10].

The Money Machine

The financial infrastructure behind Trump's revenge primaries dwarfs anything seen in comparable intra-party contests. MAGA Inc., the pro-Trump super PAC, sits on $304 million heading into the midterm cycle, and Republican committees collectively hold nearly $850 million [11].

The Kentucky Senate race offers the starkest illustration of how billionaire and dark money spending has reshaped these contests. Total spending in the GOP primary reached $48 million through March 2026, with $28 million directed to television advertising alone [12]. Elon Musk contributed $10 million to Fight for Kentucky PAC supporting businessman Nate Morris, while hedge fund manager Thomas Klingenstein added $2.5 million and Texas oil billionaire Timothy Dutton contributed $1 million [12]. Andy Barr's campaign benefited from $11.5 million through Keep America Great PAC, whose largest donors were dark money groups — $5 million from American Jobs And Growth Fund and $1.6 million from Defend Us Inc., organizations that do not disclose their own donors [12]. Cryptocurrency firm Crypto.com contributed $2.3 million to the same PAC [12].

By comparison, standard contested state senate primaries in Indiana typically involve total spending in the low six figures, making the $11.8 million pouring into this cycle's races represent a roughly 20-fold increase [1][3].

Trump's Endorsement Track Record

Trump's overall endorsement record in primaries appears formidable on the surface: 95% of his backed candidates won or advanced in 2022, and 96% in 2024 [13]. But those headline numbers are inflated by endorsements of incumbents facing little or no opposition. In contested primaries where Trump endorsed non-incumbents — the races most comparable to his current revenge campaigns — his win rate drops to 82% in both 2022 and 2024 [13][14].

Source: NPR / FiveThirtyEight

Data as of Nov 1, 2024CSV

More critically, Trump's primary successes have not always translated to general election victories. In 2022, several high-profile Trump-backed primary winners went on to lose winnable Senate seats: Mehmet Oz fell to John Fetterman in Pennsylvania, Herschel Walker lost to Raphael Warnock in Georgia by nearly three points, and Don Bolduc was defeated by Maggie Hassan in New Hampshire [15][16]. All of Trump's endorsed candidates in 2022 "toss-up" House seats lost [15]. This pattern raises a question that haunts the current revenge campaign: even if Trump's preferred candidates prevail in May, will they hold up in November?

Historical Precedent: The Perils of the Presidential Purge

Trump is not the first president to wage war on his own party's dissidents. The most instructive parallel is Franklin D. Roosevelt's 1938 "purge" campaign, in which FDR personally stumped for liberal challengers against conservative Southern Democrats who had blocked his New Deal legislation [17]. Roosevelt denounced the incumbents as traitors to reform and traveled to their states to campaign against them.

The effort was a spectacular failure. All but one of FDR's targets survived their primaries, and Republicans went on to gain over 80 House seats and eight Senate seats in the November midterms [17]. Historians attribute the failure to the strength of local political relationships and voters' resentment of presidential interference in state-level races — dynamics that could also apply in Indiana, where the targeted senators have deep roots in their communities [17].

Trump's campaign differs from FDR's in one important respect: the financial resources available. FDR relied primarily on personal appearances and bully pulpit rhetoric. Trump's allies can deploy millions in television advertising, targeted digital campaigns, and direct mail — tools that may overcome the incumbency advantages that saved FDR's targets [3][6].

The Democratic Argument Against the Purge

Critics of Trump's revenge primaries raise several concerns beyond raw electoral politics. The Indiana redistricting fight illustrates the tension between presidential power and federalism: these state senators voted against a map they believed was an improper mid-decade gerrymander imposed by Washington, exercising a form of institutional independence that the American system was designed to protect [4][3].

When a president can effectively punish state legislators for casting votes he dislikes — using nationally sourced money to overwhelm local races — it raises questions about the independence of elected officials at every level of government. Former Governor Daniels framed this as a state sovereignty issue: Indiana legislators were elected to represent Hoosier interests, not to serve as an extension of the White House's congressional strategy [3].

There is also the general election risk. Candidates selected primarily for loyalty to the president may lack the local credibility, moderate appeal, or independent policy identity needed to win in competitive general elections — the pattern that cost Republicans Senate seats in 2022 [15][16].

The Case for the Purge

Defenders of Trump's approach make a straightforward democratic argument: primary elections are the mechanism by which parties choose their nominees, and if GOP voters in these districts prefer Trump-aligned candidates, that reflects the will of the party's current base [6].

The redistricting vote offers a concrete case study. Trump and his allies argue that the Indiana senators who blocked the new maps directly undermined the Republican Party's ability to hold the House — a calculation with national implications. From this perspective, holding elected officials accountable for votes that harm the party's electoral prospects is not a "purge" but standard political accountability [4][6].

The financial argument also cuts both ways. If outside money is problematic in these races, it is equally present on the incumbents' side: establishment Republican donors and business interests have also mobilized to defend the targeted senators [6]. The question of whether national money belongs in local races applies to both sides.

Moreover, the Republican Party has shifted. Polling consistently shows that Trump commands the loyalty of a large majority of Republican primary voters. If the party's base has moved, the argument goes, its officeholders should move with it or face the voters [8].

Who Decides: Voter Demographics and Turnout

The outcome of these primaries will likely hinge on turnout among specific voter blocs. In Indiana's state senate districts, the key constituencies include rural voters, who tend to be more responsive to Trump's endorsements, and suburban and small-city voters, who may have stronger ties to incumbent senators they have supported for years [1][5].

Primary turnout in state legislative races is typically low — often in the range of 15–20% of registered voters — which gives motivated factions outsized influence [1]. The massive ad spending in these races may boost turnout above normal levels, but it is unclear which side benefits more from higher participation. One Indiana voter told NPR he planned to vote for Deery specifically because the negative ads against the incumbent struck him as unfair [3].

In the Kentucky and Louisiana federal races, the demographic dynamics differ. Cassidy's impeachment vote alienated rural evangelical voters but may have earned him credibility with college-educated suburban Republicans — a shrinking share of Louisiana's GOP primary electorate [7][8]. Massie's libertarian brand appeals to a cross-cutting coalition that includes both rural constitutionalists and younger voters skeptical of executive power, making his race harder to predict [9][10].

What Survives the Purge

If Trump's targets lose on Tuesday and in the weeks that follow, the institutional mechanisms for dissent within the Republican Party will narrow further. Liz Cheney's removal from House Republican leadership in May 2021 and her subsequent primary defeat in Wyoming in August 2022 demonstrated the consequences of opposing Trump [18]. Mike Gallagher, once a defense hawk who praised Cheney as "a principled conservative," reversed his position and voted to oust her — an illustration of how the threat of a primary challenge can discipline even those not directly targeted [18].

The remaining institutional channels for internal dissent include committee assignments (which House and Senate leadership control), conference rules that govern internal party governance, and donor networks that can sustain independent-minded candidates. But these mechanisms have weakened as Trump-aligned leadership has consolidated control over party infrastructure [18].

A handful of Republican officials have survived Trump's targeting — most notably, Alaska Sen. Lisa Murkowski, who won reelection in 2022 despite Trump endorsing her opponent, aided by Alaska's ranked-choice voting system [13]. But Murkowski's survival depended on a structural reform that most states lack.

The Stakes on Tuesday

The Indiana primaries are a test not just of Trump's endorsement power but of a broader question: whether a sitting president can use the primary process to enforce discipline on elected officials at every level of government, from state legislatures to the U.S. Senate.

If the Trump-backed challengers sweep, it will confirm that defying the president on any significant vote carries a political death sentence for Republican officeholders — a signal that will reverberate through every future legislative debate where the White House demands loyalty. If the incumbents hold, it will suggest that local relationships, institutional knowledge, and voter resentment of outside interference still count for something in American politics.

Either way, the $12 million flooding into Indiana state senate races, the $48 million reshaping Kentucky's Senate primary, and the millions more coursing through Louisiana's contest represent a new chapter in the relationship between presidential power and party democracy. The voters who show up on Tuesday — and in the weeks that follow — will write it.