In Pictures: The 15 Worst Presidents in U.S. History

From George Washington to Donald Trump, who are the worst U.S. presidents in history?

The 2018 Presidents and Executive Politics Presidential Greatness Survey, which ranks presidents from best to worst, was based on responses from 170 current and recent members of a section of the American Political Science Association, an organization of social science experts. Each U.S. president was ranked out of 100 as part of this survey.

George W. Bush, 2001-2009, scored 40.42 and is ranked at 15th. But one president scored just over 12 points, coming in dead last among U.S. commanders-in-chief in an expert rankings survey released on President's Day.

Check the complete slideshow to see who's at the bottom of the ranking.