Â鶹´«Ã½AV

PRINCETON, NJ -- Americans continue to give Congress low approval ratings this year, with 20% approving in the latest USA Today/Â鶹´«Ã½AV poll. Recent ratings of Congress are only slightly improved from the near-record low obtained in March.

From a historical perspective, Americans' job approval ratings of Congress in 2010 rank among the lowest Â鶹´«Ã½AV has measured in a midterm election year. The 16% recorded in March is the lowest single reading in a midterm election year, just above the low from all years of 14% in July 2008.

This year's low approval ratings for Congress are a potentially ominous sign for President Obama and the Democratic majority in Congress. Â鶹´«Ã½AV has found greater party seat change in Congress in midterm elections when Congress has had low approval ratings.

Specifically, in the five midterm elections in which Congress' approval ratings at the time of the election were below 40%, there was an average net change in seats of 29 from the president's party to the opposition. That includes the 1994 and 2006 elections, when the net change in seats was large enough to pass control of the U.S. House from one party to the other.

There has been far less party seat change when Congress' approval ratings exceeded 40%. This has been the case in only three midterm elections (1986, 1998, and 2002); Americans typically do not rate Congress all that positively. In each of these elections, the net seat change by party was five or six seats.

There is little in the historical record to suggest that Congress' approval rating could reach the 40% level this year. In 1990, 1994, and 2006, Congress' approval ratings began the year under 30% and stayed below that mark for the entirety of those election years. Only in 1974 did Congress' approval rating start low and show significant improvement. Richard Nixon's resignation as president due to the Watergate scandal sparked a brief rally in support for government leaders, which moved Congress' approval score from 30% in April to 47% in August. However, by the time of the 1974 elections, Congress' approval rating had fallen back to 35%. (Â鶹´«Ã½AV asked about Congress approval only once each in 1978 and 1982.)

In 1998 and 2002, two years in which Congress' approval ratings were above 40%, its ratings started the year above 40% and never fell below that mark. (Â鶹´«Ã½AV asked about Congress approval only once in 1986.)

Bottom Line

Low congressional approval ratings are usually associated with greater party turnover in House seats in a midterm election, and this year's job approval scores for Congress rank among the lowest Â鶹´«Ã½AV has measured in a midterm election year.

Nevertheless, Â鶹´«Ã½AV has found that , when the two are at odds. That was the case in 1990, for example, when 26% approved of Congress but 58% approved of President George H.W. Bush, and only eight seats changed party hands. This year, however, President Obama's approval ratings , and, unlike 1990, both Congress and the presidency are now controlled by the same party. Together, these findings suggest that under the current environment, Democrats could expect to lose a significant number of U.S. House seats on Election Day.