Rep. Mike Castle (R-DE) told Roll Call "that he's leaning more toward running for Senate rather than another term in the House, if he decides to run for Congress again in 2010."
In an interview, Castle "also acknowledged that several GOP Senators, including John McCain (R-AZ), have been pushing him in recent weeks to make the move to the other side of Capitol Hill. He said a final decision on his 2010 plans would likely have to come by early summer at the latest."
On factor: He's got strong competition if he decided to run again for his House seat.