WASHINGTON (AP) — Republicans have blocked for a second time this year legislation to establish a nationwide right to in vitro fertilization, arguing that the vote is an election-year stunt after Democrats forced a vote on the issue.

The Senate vote was Democrats' latest attempt to force Republicans into a defensive stance on women's health issues and highlight policy differences between Vice President Kamala Harris and former President Donald Trump in the presidential race, especially as Trump has called himself a " leader on IVF."

The 51-44 vote was short of the 60 votes needed to move forward on the bill, with only two Republicans voting in favor. Democrats say Republicans who insist they support IVF are being hypocritical because they won't support legislation guaranteeing a right to it.

"They say they support IVF — here you go, vote on this," said Illinois Sen. Tammy Duckworth, the bill's lead sponsor and a military veteran who has used the fertility treatment to have her two children.

The Democratic push started earlier this year after the Alabama Supreme Court ruled that frozen embryos can be considered children under state law. Several clinics in the state suspended IVF treatments until the GOP-led legislature rushed to enact a law to provide legal protections for the clinics.

Democrats quickly capitalized, holding a vote in June on Duckworth's bill and warning that the U.S. Supreme Court could go after the procedure next after it overturned the right to an abortion in 2022.

The bill would establish a nationwide right for patients to access IVF and other assisted reproductive technologies and a right for doctors and insurance companies to provide it, an effort to pre-empt state efforts to limit the services. It would also require more health insurers to cover it and expand coverage for military service members and veterans.

Republicans argued that the federal government shouldn't tell states what to do and that the bill was an unserious effort. Only Republican Sens. Susan Collins of Maine and Lisa Murkowski of Alaska voted with Democrats to move forward on the bill both times.

Meanwhile, Republicans have scrambled to counter Democrats on the issue, with many making clear that they support IVF treatments. Trump last month announced plans, without additional details, to require health insurance companies or the federal government to pay for the fertility treatment.

In his debate with Harris earlier this month, Trump said he was a "leader" on the issue and talked about the "very negative" decision by the Alabama court that was later reversed by the legislature.

South Dakota Sen. John Thune, the No. 2 Senate Republican, said that Democrats are trying to create a political issue "where there isn't one."

"Let me remind everybody that Republicans support IVF, full stop," Thune said just before the vote.

The issue has threatened to become a vulnerability for Republicans as some state laws passed by their party grant legal personhood not only to fetuses but to any embryos that are destroyed in the IVF process. Ahead of the its convention this summer, the Republican Party adopted a policy platform that supports states establishing fetal personhood through the Constitution's 14th Amendment, which grants equal protection under the law to all American citizens. The platform also encourages supporting IVF but does not explain how the party plans to do so.

Republicans have tried to push alternatives on the issue, including legislation that would discourage states from enacting explicit bans on the treatment, but those bills have been blocked by Democrats who say they are not enough.

Sen. Rick Scott, a Florida Republican, said in a floor speech then that his daughter was currently receiving IVF treatment and proposed to expand the flexibility of health savings accounts. Republican Sens. Katie Britt of Alabama and Ted Cruz of Texas have tried to pass a bill that would threaten to withhold Medicaid funding for states where IVF is banned.

Cruz, who is running for reelection in Texas, said Democrats were holding the vote to "stoke baseless fears about IVF and push their broader political agenda."