What to watch for on Tuesday

-South Carolina Rep. John Spratt, second-ranking Democrat on the House Armed Services Committee, is seeking a 15th term. Missouri Rep. Ike Skelton, chairman of Armed Services, is seeking an 18th term. Texas Rep. Chet Edwards, 13th-ranking Democrat on the Appropriations Committee, is seeking an 11th term. Minnesota Rep. James Oberstar, chairman of the Transportation and Infrastructure Committee, is seeking a 19th term. In 2008, they won by 25, 32, 7 and 36 percentage points, respectively. In 2010, all are vulnerable, so voters in four districts could subtract 118 years of seniority.

-For 55 years, Rep. John Dingell (D-Mich.), 84, has occupied the seat his father held for 22 years before him. The son received 71 percent in 2008. His district includes Ann Arbor, which requires conservatives to leave town at sundown. (Just kidding. Sort of.) He beat his 2008 Republican opponent by 46 points. Dingell probably will win while setting the 2010 record for the largest shrinkage of a 2008 majority.