Thats how I see it. But the fact is he just demonstrated how wrong Bush and Santorum were in 2004.
He said that he worked to represent the people of PA and not a party. If that is so, then it should not matter which party he belongs to. In essence, that statement contradicts what he has done. Actually, what is more the truth is that he knows he would not win re-election, which he has admitted, and he feels he would still "have a job" if he became a Democrat. That is all this is about. Not the people. Not being right or left. For Specter, it is about the position that pays him a salary that he wants.
Although I am glad we are rid of him, he has picked the worst time to do this. And what happens to all the money he has taken from people for his campaign as a Republican candidate? I sure hope they get that back.