Most unpopular president ever in second term

Can we quit with the "popular president" schtick?

Here are the ratings for presidents as recorded by Gallup in the March following their re-election:

Truman, 1949: 57%.

Eisenhower, 1957: 65%.

Johnson, 1965: 69%.

Nixon, 1973: 57%.

Reagan, 1985: 56%.

Clinton, 1997: 59% .

Bush, 2005: 45%

There's a "mandate" for you. 11 points less popular than the next least popular president at this point in their term.