REDISTRICTING

Top 10 Most Endangered Democrats

WASHINGTON - MAY 4: Democrats from the U.S. House of Representatives, including (L-R) Rep. John Barrow (D-GA), Rep. Rosa DeLauro (D-CT), and Minority Leader Nancy Pelosi (D-CA), visit after news briefing to unveil legislative proposals on health care at the Capitol May 4, 2005 in Washington, DC. The proposals are that are part of the Democrats New Partnership for America's Future and marks the third in a series of legislative initiatives that promote Democratic priorities. (Photo by Chip Somodevilla/Getty Images) (Chip Somodevilla/Getty Images)

By David Wasserman and Julia Edwards

Updated: April 21, 2011 | 12:46 p.m.
April 20, 2011 | 12:55 p.m.

Once every decade, certain unfortunate incumbents are sucked into a ritual of panic. Census data is released and district lines are redrawn according to their reported populations -- leaving congressmen who have grown accustomed to loyal constituencies in their wake. The Cook Political Report's redistricting guru David Wasserman takes a look at the 10 most nervous Democrats in this click through gallery.

Click to see the 10 endangered Republicans>>