President Donald Trump/Vice President Mike Pence - 273 Electoral Votes
Fmr. President Barack Obama/Fmr. Senator Russ Feingold - 265 Electoral Votes
Former Vice President Biden declines to run for a third term or for the presidency, leaving Obama to pick Russ Feingold as his running mate. This is a very close race, with Virginia being the deciding factor. During the election, it leaned Obama's way until the last few weeks. On election night, Ohio, Iowa, Virginia, Florida, and ME-02 all go for Trump, getting him re-elected.
Trump is impeached two years later, causing him to resign in a Nixon-Esq fashion. President Pence goes on to receive a second term, barely defeating numerous candidates in the primaries, and President Pro-Tempore Elizabeth Warren. He is defeated in a landslide next election.
Geez, I put so much detail into that, I should just make it into a timeline.