Only 24% of those surveyed say most members of Congress deserve re-election, the lowest percentage since Gallup began asking the question in 1991. Fifty-six percent say their own representative deserves another term, similar to the levels just before tumultuous elections in 1994, 2006 and 2010 that changed control of the House or Senate.

And a majority of Americans, 51%, say President Obama doesn’t deserve re-election; 47% say he does. Obama bests an unnamed Republican presidential candidate by 49%-45%, though he remains below the 50% threshold…

In the GOP contest to challenge Obama, former Massachusetts governor Mitt Romney continues to lead the field, at 24%, but a potential candidate who hasn’t entered the race yet is in second place.

Texas Gov. Rick Perry, who is exploring a presidential campaign, ranks behind Romney at 17%. Texas Rep. Ron Paul is third at 14%, followed by Minnesota Rep. Michele Bachmann at 13%.