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.