President Donald Trump's lawyers are fighting to keep former national security adviser John Bolton off Capitol Hill after he claimed in a forthcoming book that Trump directly ordered a freeze in military aid to Ukraine until Kyiv investigated Joe Biden. Trump and his allies are distancing themselves from Bolton, insisting he only made the damaging claim to boost book sales. Meanwhile, Senate Democrats are pressuring their GOP counterparts to allow Bolton's testimony, which could open the door to more witnesses.
What's the bigger picture? While Trump's still expected to be acquitted, his supporters worry that an extended impeachment trial could derail his reelection campaign — though Democratic senators running against him are also being kept off the trail.