Sen. Casey Endorses Obama

Sen. Obama kicks off his one week tour of Pennsylvania with a huge endorsement today: Sen. Robert P. Casey Jr. Casey's endorsement gives the Illinois Senator an outside chance to steal Pennsylvania as it will enable Obama to make inroads into some key constituencies. Casey, a devout Catholic, will certainly help Obama with the 53.5% of Pennsylvanians who identify themselves as Catholic.

Casey's clout in Pennsylvania should not be underestimated. His father was one of the state's most popular Governors and Casey himself has built an accomplished record of service in the state.