Chris Cillizza,
The Washington PostWhile the recent political chatter in Washington has focused on Democrats retiring from Congress, Republicans are leaving the House in greater numbers, a trend that could blunt the party's momentum heading into the November midterm elections.
Rep. Henry E. Brown Jr. (S.C.) on Monday became the 14th Republican to announce that he will not run for reelection this year. Ten Democrats have said the same, including an attention-grabbing four in the past two months from swing and Republican-leaning districts.
A broad look at those seats suggests more parity, in terms of the two parties' opportunities and vulnerabilities, than conventional wisdom would suggest.
Each side has three seats won by the other party's presidential candidate in 2008. For Democrats, they are Louisiana's 3rd District and Tennessee's 6th and 8th districts; for Republicans, they are Delaware's at-large seat, Illinois's 10th District and Pennsylvania's 6th District.
http://www.washingtonpost.com/wp-dyn/content/article/2010/01/04/AR2010010403313.html?wprss=rss_politics