Schwarzenegger another Specter?

Rumor has it that next year when Diane Feinstein runs for governor, Arnold Schwarzenegger will run for her senate seat.  Honestly the possibility has excited me for a while.  While he is definitely a moderate, he could win that senate seat, and a Republican pick up of that seat would be amazing.  

While I am tolerant of moderate Republicans occupying seats conservatives probably couldn't win, I can't stand moderates who undermine the Republican Caucus.  Schwarzenegger's recent actions make me wonder if he might be another Specter in the U.S. Senate.  Instead of spending this weekend at his own state convention working with his party to find solutions for the fiscal mess facing his state, the Governator is spending the weekend partying with Obama.  It seems that an event like this is rather critical for any party leader to attend.  Is Schwarzenegger focused more focused on media attention, or building his party?  If he becomes a senator and undermines his caucus to get media attention, I'm not sure we want him there.