How Two Words Killed a Decade of Bipartisan Work on a Women's History Museum

For more than ten years, a Smithsonian museum dedicated to American women's history seemed like one of the few things Washington could agree on. On May 21, 2026, the House proved otherwise. The Smithsonian American Women's History Museum Act failed 204-216, with every Democrat and six Republicans voting no [1]. The proximate cause: an amendment inserting the phrase "biological women" into the museum's mission statement, turning a bipartisan legacy project into the latest front in the nation's culture war over gender identity.

Source: U.S. House of Representatives

Data as of May 21, 2026CSV

A Bill With 231 Friends — Until It Didn't

Rep. Nicole Malliotakis (R-NY) introduced H.R. 1329 in February 2025. By early 2026, it had accumulated 231 co-sponsors — 127 Democrats and 104 Republicans [2]. The legislation's purpose was narrow: designate a plot on the National Mall for the museum Congress had already authorized in December 2020, when the Smithsonian American Women's History Museum Act was signed into law as part of the Consolidated Appropriations Act alongside a parallel authorization for a National Museum of the American Latino [3].

The 2020 law contained no language about biological sex. Neither did H.R. 1329 as originally introduced [4].

That changed in March 2026, when Rep. Mary Miller (R-IL) introduced an amendment in the Committee on House Administration. The amendment, adopted on a party-line vote, added three provisions that would fundamentally alter the bill's character [5]:

1. The museum "shall be dedicated to preserving, researching, and presenting the history, achievements and lived experiences of biological women in the United States."
2. "The Museum may not identify, present, describe, or otherwise depict any biological male as a female."
3. The president could "designate an alternative site for the Museum within 180 days" of enactment [1][5].

Within weeks, 146 House Democrats signed a letter opposing the amended bill [1]. Every one of the 127 Democratic co-sponsors withdrew support.

Source: Congress.gov

Data as of May 21, 2026CSV

The Democratic Case Against the Bill

Democrats offered three primary objections to the amended legislation.

The "biological" language was seen as an anti-trans poison pill. The Democratic Women's Caucus, chaired by Rep. Teresa Leger Fernández (D-NM), issued a formal statement accusing Republicans of "targeting transgender women and girls" and warned the language "invited arbitrary enforcement" over which historical figures could be featured [6]. Rep. Judy Chu (D-CA) said Republicans had "layered on divisive anti-trans culture war language that had nothing to do with the original bipartisan bill" [1].

Rep. Sarah McBride (D-DE), the first openly transgender member of Congress, framed the objection around presidential authority as well: "Allowing Donald Trump to decide what goes in and where this museum is located is not something that members of our caucus are comfortable with" [5].

The bill gave the president unilateral power over the museum's site. Democrats argued that allowing the president to override the designated Mall location undermined the Smithsonian Institution's independence. Previous Smithsonian museums have had their sites determined through the legislative process, not executive discretion [1][5].

The museum was decoupled from the Latino museum. The 2020 authorization law paired the women's museum with the National Museum of the American Latino. Republicans advanced only the women's museum bill, dropping the Latino museum. Former Speaker Nancy Pelosi and the Democratic Women's Caucus demanded restoration of the pairing [7]. Democrats saw the separation as part of a broader pattern in which anti-immigration and anti-DEI sentiment drove the wedge between the two projects [7].

The Republican Case For the Bill

Republicans framed the Democratic opposition as extreme and out of step with public opinion.

Malliotakis was blunt: "A women's history museum is supposed to be dedicated to women, period. The fact that they're going to pull their support after overwhelmingly co-sponsoring this bill because the word biological was inserted, to me, is ludicrous" [8]. She called the Democratic walkout "a disgrace" and accused opponents of being "trans obsessed" [8].

Speaker Mike Johnson said the inclusion of "biological women" made Democrats "run for the hills" [1].

The White House backed the amended bill. The Office of Management and Budget issued a statement of administration policy supporting the legislation because it would "dedicate" the museum to "presenting the history and experiences of actual women and prevents the museum from depicting males as women" [9].

Supporters argued the amendment merely codified what most Americans already understood the museum's purpose to be: honoring women defined by biological sex. They pointed to polls showing that public opinion had shifted toward support for sex-based distinctions in various policy contexts.

What the Polls Actually Show

The political calculus around the "biological" language is more complicated than either side acknowledges. A February 2025 Pew Research Center survey of 5,097 adults found that 66% of Americans favor requiring transgender athletes to compete on teams matching their sex assigned at birth, and 49% favor requiring people to use bathrooms corresponding to their birth sex [10]. Support for restrictions has increased across the board since 2022 — up 8 to 10 percentage points on several measures [10].

Source: Pew Research Center

Data as of Feb 26, 2025CSV

At the same time, 56% of adults support laws protecting transgender people from discrimination in jobs, housing, and public spaces [10]. And a separate April 2025 poll by 19th News and SurveyMonkey found that 49% of Americans believe politicians should not be focusing on transgender issues at all [11]. A February 2026 survey for the Human Rights Campaign Foundation reported 85% support for equal rights and protections for transgender people in general terms [11].

The polling suggests a public that broadly supports sex-based distinctions in competitive athletics and some physical spaces while simultaneously opposing discrimination and expressing fatigue with the political salience of the issue. Whether opposing a women's museum over the word "biological" reads as principled inclusion or politically tone-deaf depends heavily on how the question is framed — a reality both parties are eager to exploit.

The Six Republican Defectors

The bill's failure was not entirely a partisan story. Six Republicans crossed the aisle to vote no: Reps. Keith Self (R-TX), Josh Brecheen (R-OK), Michael Cloud (R-TX), Warren Davidson (R-OH), Andy Harris (R-MD), and Tim Burchett (R-TN) [12].

Their reasons had nothing to do with the Democratic objections. Davidson told the Washington Times, "It was a bad idea. I think we should have one American history museum" [12]. Self expressed concerns about "identity politics" and opposed putting the museum on the Mall [12]. Burchett voted no because he feared Democrats would eventually change the museum's scope to include transgender people when they returned to power [12]. A GOP staffer told the Washington Examiner that the defecting members worried the museum would become "woke" regardless of the current language [12].

The six Republican defections, combined with eight Republicans who did not vote, meant the bill would have struggled to pass even with full Democratic support — though the margin would have been far more comfortable if any significant fraction of the 127 original Democratic co-sponsors had remained.

The Money and the Precedent

The land-transfer bill itself carried no direct appropriation [13]. The museum project has already raised approximately $70 million in private donations, which would be eligible for matching federal funds [13]. The funding model mirrors the approach used for the National Museum of African American History and Culture, which cost $540 million to design, build, and install exhibits — half from federal appropriations, half from Smithsonian fundraising and private donations [14]. The National Museum of the American Latino is projected to cost between $600 million and more than $1 billion, following the same split-funding model [15].

Without a site designation, the women's museum remains in administrative limbo. The 2020 law authorized its creation and established a board, but the museum needs congressional action to secure a location on or near the Mall.

Was the Amendment Strategy or Substance?

The central question hanging over the bill's collapse is whether Miller's amendment was a sincere policy choice or a deliberate wedge designed to fracture Democratic support.

The evidence points in both directions. Miller and other social conservatives have pursued "biological sex" definitions across multiple policy areas — from Title IX enforcement to bathroom access to military service — as part of a sustained effort to roll back gender-identity protections [10]. The amendment is consistent with that agenda and with President Trump's January 2025 executive order defining sex as "sex at conception" for federal purposes [16].

But the amendment's practical effect on the museum's content remains debatable. No specific historical figure has been identified whose inclusion would be barred. The Smithsonian Institution, which would operate the museum, has not publicly commented on how it would interpret the "biological women" restriction in curatorial practice [1]. Whether figures like Marsha P. Johnson — a transgender woman and pivotal figure in the Stonewall uprising — or intersex individuals would be excluded is a question the legislation left unresolved.

The timing is also telling. The amendment was introduced after the bill had already secured strong bipartisan support, and it was adopted on a party-line committee vote. Democrats characterized it as an "eleventh-hour" maneuver [1]. If the goal was to pass a museum bill, adding the language after 127 Democrats had already signed on was a predictable way to lose their votes. If the goal was to force Democrats into a vote against a "women's history museum," the strategy worked as designed.

Legal Terrain: Uncharted

There is no direct legal precedent for how federally chartered museums define the subjects they commemorate through biological-sex restrictions. Title IX of the Education Amendments of 1972 prohibits sex discrimination in federally funded education programs and has been applied to museums that receive federal funding [16]. However, the Supreme Court's 2020 decision in Bostock v. Clayton County — which held that firing an employee for being transgender constitutes sex discrimination under Title VII — was explicitly limited to employment law and did not address Title IX or other statutes [16].

President Trump's administration has taken the position that Title IX protects only against discrimination based on biological sex, not gender identity [16]. Courts remain divided on the question. The Fourth Circuit ruled in Peltier v. Charter Day School (2022) that sex-based dress codes at a publicly funded charter school violated the Equal Protection Clause, but that case involved a school, not a museum [16].

Whether a biological-sex restriction in a museum's founding charter would survive an Equal Protection challenge is an open question — one that may never be tested if the bill remains dead.

What Comes Next

The museum now joins a growing list of bipartisan projects torpedoed by culture-war amendments. The 2020 authorization remains law, but without a site, construction cannot begin. Malliotakis has signaled she may reintroduce the bill [8]. Whether a future version strips the "biological" language or doubles down on it will reveal which side of the party believes it holds the stronger hand.

For the museum's advocates — many of whom have worked on the project since the 105th Congress in the late 1990s — the defeat is a bitter irony. A institution meant to honor women's history has become, at least for now, a casualty of an argument about who counts as a woman.

Democrats face their own reckoning. They opposed a bill that 127 of their members originally co-sponsored, on terms that allow Republicans to run attack ads accusing them of voting against a women's history museum. Whether voters see that choice as principled or self-destructive depends on the same polling ambiguities both parties are trying to navigate — and on whether the word "biological" strikes most Americans as a reasonable clarification or an unnecessary exclusion.