Senate Democrats on Wednesday plan to force a vote on a health-care measure in an effort to put Republicans on the record against pre-existing condition protections ahead of the midterm elections.

Democrats say the vote will highlight that President Trump and congressional Republicans support the expansion of non-ObamaCare plans which can deny coverage for people with pre-existing conditions, an issue that Democrats have made the centerpiece of their electoral strategy.

The measure appears headed for defeat after Sen. Lisa Murkowski (R-Alaska), a key swing vote, said she would oppose the Democratic measure, with her office noting that while short-term plans are “not ideal” she wants Alaskans to have options for cheaper coverage. Sen. Susan Collins (R-Maine) said she is undecided, but Democrats would need another Republican vote beyond Collins.

Democrats maintain that even a failed vote will help them bring the issue of pre-existing conditions to the fore ahead of next month’s elections. The legislation is sponsored by Sen. Tammy Baldwin (D-Wis.), who is up for reelection this year, and has the support of all 49 members of the Senate Democratic Caucus, meaning supporters need two GOP votes to pass it.