Mississippi's 1st District holds a special congressional election runoff Tuesday.
The special election follows one last month in which Democrat Travis Childers came out on top in a six-candidate race but with just 49 percent of the vote, requiring a runoff.
Republican Greg Davis was second with 46 percent.
The north Mississippi district has been represented by a Republican since 1994. A victory by Childers would be the second congressional setback for the GOP in just over a week. Democrats took over a Louisiana House seat May 3rd.
Davis got some high-level help on the eve of the runoff. Vice President Dick Cheney attended a rally for Davis. Cheney told the rally that Davis would support President Bush on his policies in Iraq, on maintaining tax cuts championed by the president and on programs supported by the national Republican Party.