impeachment. and under the constitution, every senator is required to be impartial. and he's already said that he is going to violate that oath. >> now two law professors who testified on opposite sides of the house impeachment hearing are now battling out in print. professor jonathan turley, called as a republican witness during the house impeachment proceedings wrote in an op-ed that the notion that president trump is not technically impeached until house speaker nancy pelosi actually sends the articles to the senate is false. he writes while this theory may provide tweet-ready fodder for the president to defend himself and taunt his political adversaries, it is difficult to sustain on the text or history or logic of the constitution. make no mistake, the house speaks in its own voice and in its own time. it did so on december 18th, 2019. turley was responding to noah feldman, harvard law professor, who despite being in favor of the impeachment wrote in an op-ed that trump would not be impeached until the articles