Election Day losses in Virginia and New Jersey have congressional Democrats focused like never before on jobs — their own.

While the White House and party leaders are urging calm, Democratic incumbents from red states and Republican-leaning districts are anything but; Tuesday's statehouse defeats have left them acutely aware that their votes on health care reform and other major Obama initiatives could be career-enders in 2010 or beyond.

“I should be nervous,” said Rep. Parker Griffith, a freshman Democrat from Huntsville, Ala...