I would say George W. Bush. He nearly made the U.S. broke.
And we were not broke already? We have been in debt for like ever now.
James Buchanan sucked balls. He did nothing and let all the states leave the Union.
William Howard Taft was bad, but not really his fault. Eh, well kinda. Followed Teddy rules but didn't do it well so he pissed everyone off.
Ulysses S. Grant was corrupt as hell. I don't remember why.
Martin Van Buren was same as Taft except followed Jackson.
John Quincy Adams was ahead of his time, which was bad for his sake.
Ya, that is a pretty good list or should I say bad list.