Redistricting in Iowa eliminates one member's turf, leaving an incumbent vs. incumbent contest that will be a race to watch. Click through for more videos on the shifting electoral map.
Among the many members at risk during redistricting, Republican Ron Paul of Texas and Democrat of Ohio are two characters to watch during the process.
Redistricting will narrow the playing field for Democrats in 2012. David Wasserman explains.
Democrats are using the Voting Rights Act in an effort to hold onto districts as lines are redrawn following the 2010 Census.
Video by Theresa Poulson with photos by Getty Images, courtesy of govtrack.us, iowapolitics.com and Mark Warner contributed to this article.