The U.S. Senate is set to vote on Tuesday on a bill to enshrine federal protections and expand insurance coverage for fertility treatments, days after Republican former President Donald Trump surprised supporters by saying he would support such a law.

Election season is heating up, and at the center of the debate are reproductive rights, with particular attention to in vitro fertilization. Two pieces of legislation under their respective political parties failed to pass.

Senate Democrats sought to advance the Right to IVF Act, spearheaded by Sen. Tammy Duckworth, D-Ill., in a move that they argued drew a contrast between the Republicans who voted against it and their party's presidential nominee Donald Trump, who has pledged his administration would require the government or insurance companies to pay for IVF.