Best to worst:
1 Coolidge
2 Reagan
3 Harding
4 George W. Bush
5 Taft
6 McKinley
7 Kennedy
8 Eisenhower
9 Ford
10 George H. W. Bush
11 Nixon
12 Truman
13 Clinton
14 Carter
15 Theodore Roosevelt
16 Hoover
17-18 (tie) Obama
17-18 (tie) Lyndon Johnson
19 Franklin Roosevelt
20 Wilson