I don't know the legality of Trump's trial after office, but a state-level defendant can be tried even in absentia. Regardless, the impeachment trial or exercise can be one of procedure or Congressional precedent. Otherwise, any U.S. president can wait until the end of his or her tenure or term to commit an impeachable offense.
A comment on "McConnell seeks to push Trump impeachment trial to February" (M.C. Jalonick and L. Mascaro)
Jubalyn ExWilliams lives in Pennsylvania (United States). You can find her writings and commentaries, including the one on "McConnell seeks to push Trump impeachment trial to February Negotiations under way in Nigeria to free abducted children" by Jalonick and Mascaro, at landturn.com/blog.
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