WASHINGTON (Reuters) – Political survival will be high on lawmakers' minds when the Democratic-led U.S. Congress returns to work on Tuesday amid widespread voter dissatisfaction with its performance.

While the debates over healthcare reform, global warming and banking legislation and the wars in Iraq and Afghanistan will dominate the airwaves, many incumbents, both Democrats and Republicans, are beginning to worry about holding on to their seats in November 2010 elections.

Polls show only about one-third of Americans approve of how lawmakers are doing, less than a year after President Barack Obama led Democrats to big gains in Congress. ....