Why don't you tell that to Ron Klink (clank, clunk).
Klink had a tough time as a western PA Democrat against a pretty solid conservative in Santorum. Going up against Heinz, who has looks, name, and money would be entirely different. And if his step-father is president, that would help. Santorum may be vulnerable as he can no longer be considered a pro-life candidate, thanks to his support of Specter against Toomey. I used to like Santorum a lot, was glad to give money to his campaign, and met him. But he's lost my vote. Republicans have been disappointing lately.