what recourse to a successful impeachment ignored: revolution... ?

I'd been wondering what would happen once this Kabuki dance began. Congress subpoenas Condi Rice, she says "executive privilege" and "go pound sand." What happens then? Kagro X at DailyKos summarizes:

• Subpoenas don't enforce themselves. People either comply with subpoenas because they're afraid not to, or they suffer the consequences of non-compliance.
• The consequences of non-compliance don't enforce themselves, either. People don't put themselves in jail, you've got to put them there.
• The people upon whom we usually rely to put law-breakers in jail are law enforcement officers. They work for the "unitary executive," not the courts.
• A question: If there was nobody to put you in jail for defying a subpoena, would you be bound to honor it? Not would you feel bound? Would you be bound?
• Finally, if you're not bound to honor a subpoena, is there such a thing as "subpoena power?"

Of course, if Pelosi and Reid finally snap out of it and realize the only way to bust a cap in this prick is to Impeach & Remove, what if he says, "No! Not leaving!"

What happens then?