Republicans, including Sen. Dan Sullivan, blocked the IVF bill. Lisa Murkowski and Susan Collins were the only GOP senators to support it.

Maine Republican Senator Susan Collins broke with her party's ranks and voted with Democrats in a failed bill to guarantee access to in vitro fertilization.

Democrats are pursuing new attack lines ahead of an election that many see as a referendum on reproductive rights.

The U.S. Senate will on Tuesday vote on another attempt to protect access to in vitro fertilization after a failed bid earlier this year.

Senate Majority Leader Schumer wants to put Republicans on record with their vote on IVF, which has become a flashpoint in the presidential election.

STORY: A U.S. Senate bill to provide federal protections and expand insurance coverage for fertility treatments failed on Tuesday. Republicans voted against it, despite Donald Trump recently expressing support for the policy.