[Gallup: For registered voters, environment finishes a distant seventh in a seven-horse race]

PRINCETON, NJ -- Fifty-seven percent of registered voters say the economy will be extremely important to their vote for Congress this year, making it the top issue in the 2010 elections. Healthcare, unemployment, and the federal budget deficit rank behind the economy in importance, with the environment the least important of the seven issues tested in the March 26-28 USA Today/Gallup poll.