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Kentucky Sen. Rand Paul, seen here during a confirmation hearing on Jan. 19, announced Monday he would force a vote on whether the Senate can hold a trial of a former president.
Updated 5:40 p.m. ET
After senators were sworn in Tuesday afternoon as jurors in the impeachment trial of former President Donald Trump, Sen. Rand Paul quickly pressed for a vote to force lawmakers on the record over the issue of the trial's constitutionality.
The Senate voted 55-45 to reject the Kentucky Republican's argument that the impeachment trial is unconstitutional because Trump is no longer in office.