The telephone survey of 1,017 U.S. adults indicates 18 percent of those interviewed May 8-11 approve of the current Congress. The score matches record lows from similar Gallup polls in August 2007 and March 1992.

Gallup said Wednesday the reason for the low approval rating is because "rank-and-file Democrats are providing no support cushion for the Democratic-controlled institution."

The same poll indicated approval ratings of Bush hover around his record lows, with 29 percent of respondents voicing support for the president.

Gallup reported a sampling error of 3 percentage points.