Former Rep. Wayne Gilchrest (R-Md.), who lost a primary challenge from the right in 2008, is backing Maryland Gov. Martin O'Malley (D) in his reelection race against former Gov. Bob Ehrlich (R).

Glichrest has made no secret of his disappointment in the direction his party has taken over the past few election cycles, repeatedly warning of a rightward shift in the GOP. 

The centrist Republican was defeated by state legislator Andy Harris in 2008, leading Gilchrest to endorse Rep. Frank Kratovil (D-Md.) in the general election. Kratovil ran a narrow victory over Harris two years ago and faces a rematch with the Republican this fall.