The impeachment trial of President Donald Trump began in earnest on Tuesday with a fight in the Senate over the rules that will guide the proceedings. The trial kicked off with Senate Majority Leader Mitch McConnell revising two proposed rules for the proceedings, after he came under criticism for repeatedly claiming the trial rules would follow a precedent set by President Bill Clinton’s impeachment, but released a resolution that did not necessarily hew to those standards. Trump’s impeachment trial centers on allegations that the President pressured Ukraine to investigate his political rival, former Vice President Joe Biden and his son, Hunter Biden, by threatening to withhold U.S.