We know that throughout the entire impeachment fiasco Trump’s popularity has grown with Independents and Democrats, while at the same time he lost no support from his Republican base, so he needs to take advantage of his new impeached bad-boy status and stress it; run on it. As long as President Trump continues to do a superlative job and does sincerely good things for America while in office, he should be able to coast to re-election, especially if the dense, dithering, stumbling Joe Biden becomes his opponent.
So with Mike Pence on the ticket to appeal to the more sedate and quiet members of our citizenship, and Trump being there to appeal to the more flamboyant, Republicans are a shoo-in for the presidency in 2020.