But is that even allowed if this all happens after President Trump leaves office?
The Constitution does not specifically have an answer. Under Article 1, Section 3 the Senate’s power in impeachment is described as not extending “further than removal from office and disqualification to hold” future office.
While the first point is rendered moot once Trump leaves office, the second point – about disqualification from future office – becomes key, says Stetson University constitution law professor Lou Virelli. There is something for the Senate to do that does have import and consequences and could change the relationship of President Trump to the government which the Senate is entitled to do,” Virelli said.