trump has done plenty to warrant impeachment, but the ukraine allegations are over the top. neil, are they? i mean, at this point there are crucial questions as to high this matters. if you could lay them out for us. >> yeah, i think this is more significant than, for example, the whole did trump conspire with russian in 2016 question for two reasons. one is that here you've got the actions are alleged to be the president as president taking them withholding eight that congress has appropriated in the national interests toward ukraine. and here the president is advancing his personal agenda as president using the exercise of his foreign policy powers as president. that's different than some candidate in 2016 allegedly conspiring with russia. and the second is the timing. here the president is saying, i don't have to turn over this information to congress in the teeth of a law that's been around for a long time that says