Also on the world of the Squadron Supreme, a former superhero named Kyle Richmond also became president. Richmond's crimefighting identity was Nighthawk; he was essentially the Batman of his world (I think I'd vote for Batman for president). Anyway, he eventually got controlled by an alien called Overmind, so his administration couldn't be called a complete success.
In the regular Marvel Universe in the 70s, Captain America uncovered a veritable cancer on the presidency: a president who was also secretly the leader of a criminal organization planning a takeover of the U.S. government. This president's identity is never revealed in the issue, but his suicide after a confrontation with Captain America leads to his replacement with a double so the public wouldn't know. Suspiciously, this was all around the time of the Watergate scandal.
The president in the somewhat dystopian future (or was it present?) of Frank Miller's Batman: The Dark Knight Returns looks a lot like Ronald Reagan. This President wraps himself (literally) in the flag and is unfailingly optimistic while invading Central American nations and ultimately leading the country into nuclear war.
So next time you're tempted to complain about the job a president is doing. Just think of how bad it could have been. They can't all be Kyle Richmond or Travis Morgan. Or Prez.