Six Republicans voted to go ahead with the impeachment trial of former President Donald Trump, joining all members of the Democrats caucus in saying it is constitutional. The final vote was 56-44 on Tuesday, with the trial starting on Wednesday at around 1 p.m. Republican Sens. Susan Collins (Maine), Lisa Murkowski (Alaska), Mitt Romney (Utah), Ben Sasse (Neb.), Bill Cassidy (R-La.), and Pat Toomey (Pa.) declared that the trial was constitutional, rejecting arguments from Trump’s lawyers. Other than Cassidy, the five aforementioned senators voted in favor of holding the trial last month. Those six Republicans are sure to face blowback from their constituents as Trump remains an enormously popular figure among conservatives. And for Sasse, who is said to have presidential aspirations, it will likely haunt him should he cast his hat into the 2024 contest. Sasse is facing growing pressure from within Nebraska’s Republican Party. A local Republican Party in …