CNN's Wolf Blitzer made a point of saying his network would refrain from calling any of the races in Pennsylvania, where polls remain open in two areas where there were problems earlier in the day.

But in an 8pm EST CBS News break-in, new anchor Katie Couric couldn't wait to share the good news with her fellow liberals, announcing that Bob Casey, Jr. had beaten Rick Santorum.

UPDATE, 8:40pm EST: Most of the networks have joined CBS in declaring Casey the winner, and Howard Dean just told Chris Matthews that he would personally invite Senator Casey to speak at the Democratic Convention despite being pro-life (Casey's father, the late Pennsylvania Governor Bob Casey, Sr., was excluded from the 1992 Democratic convention that nominated Bill Clinton). But CNN's Web site lists Pennsylvania as "still voting," so hasn't yet called Casey the victor.