Donald Trump may now be his party’s biggest obstacle to holding control of the Senate as the Republican president repeatedly undermines members of the caucus while his foreign policy has rankled members and encouraged divisions.
Republicans hold a 53-47 majority in the upper chamber of Congress following the 2024 election collapse of the Democratic Party. For much of 2025, it looked likely that it would take multiple election cycles for Democrats to regain the majority, if not longer.
