There are other salient issues to consider. Justice Department guidance holds that a sitting president may not be indicted. If prosecutors in the Southern District of New York believe they have a case against the president, must they hold off until after he is out of office?
If President Trump were to win re-election, he would not be out of office until 2024, when the five-year statute of limitations on a 2016 offense would have lapsed.
More importantly, do campaign finance violations qualify as “high crimes and misdemeanors,” which is the constitutional standard for impeachment? It is hard to imagine an infraction that the Justice Department often elects not to prosecute is sufficiently egregious to rise to that level, but the debate on this point between partisans would be intense.