b.t.w. I haven't answered the poll because it is misleading. There were two other Presidents in the 21st century that are not included.
True, the poll could have included both Obama and Bill Clinton. But, I think that
most posters here recognize that even with their faults neither of those presidents would come anywhere near being "worst".
It should also be pointed out that in a recent survey of historians, both Trump and Bush landed in the bottom half of the list of greatest presidents (Trump was dead last), whereas Obama and Clinton were in the top half of the list. (And lest you think their list is biased towards Democrats, Reagan scored better than Clinton and Bush Sr. was in the top half of the rankings.)
http://time.com/5165686/donald-trump-last-place-presidential-greatness/