A new Gallup poll shows Democrats with a seven-point edge over Republicans on the generic congressional ballot.

Fifty-one percent of the poll’s respondents said they would vote for an unnamed Democratic candidate in their district if the 2012 election were held today. Forty-four percent of respondents said they would vote for the GOP candidate, and 6 percent were undecided.

The survey, which was conducted Aug. 4-7 and had a margin of error of four percentage points, is a shift from polls leading up to last year’s midterms, which showed Republicans with a wide lead on the generic ballot. But as Gallup notes, the current margin for Democrats is not as wide as the party’s lead ahead of the 2006 and 2008 elections.

A separate USA Today/Gallup survey released this week showed that only 24 percent of Americans believe most members of Congress deserve reelection, the lowest such number since 1991.