House Republicans may be moving full steam ahead with their impeachment inquiry into President Biden, but a GOP senator cautioned that the president might not be impeachable.
Unfortunately not. The House can begin impeachment over anything they want, including things that are not even against the law, as long as they have the votes.
One of the articles of impeachment against Johnson was basically "this guy is an asshole". The Senate didn't vote on that article, and acquitted him otherwise.
So there is an argument that you can impeach a President for being an asshole, but it's not entirely clear.