Personally I think Specter is just the beginning. Senators are a real pile of crap which has a license to stink up the place for decades dressed up as a rose. What did it for me is the SEC issue of senators somehow beating the bubble and managing to double their investments every four years while telling the SEC they can't investigate the senate for insider trading. After all the SEC gets it's budget from the senate, as the senate told the SEC.
I'd like to see us go back to governors appointing senators from their home states for a term concurrent with the governor's seat. New governor, new senators. Automatic term limits too.