Removing a president who isn’t president?

How do you remove an expresident? He's already gone. That is the bizarre question posed by House Speaker Nancy Pelosi's quest to re-impeach Trump with just a few days left in his term. Why impeach the president now, as the House seeks to do, when there is not enough time for the Senate to hold a trial and pass judgment on the case before Trump's term expires on Wednesday, Jan. 20?

Some argue that t…