Senate Majority Leader John Thune has repeatedly ruled out invoking the nuclear option to eliminate the legislative filibuster, citing insufficient Republican support and the procedural risks amid an ongoing partial government shutdown. President Trump and senators including Mike Lee, Rick Scott, and Tommy Tuberville have intensified calls to bypass the 60-vote threshold to advance the SAVE America Act on voter identification and citizenship requirements, warning that inaction could allow Democrats to change rules later. Republicans have already applied the nuclear option to speed nominations this year, but Thune maintains the party lacks the votes for a full legislative change. Bipartisan proposals for narrower reforms, such as limiting cloture delays on routine matters, have emerged as alternatives without ending the filibuster. Upcoming Senate votes on funding measures and the SAVE Act could test internal GOP unity before the midterms.