US Chamber of Commerce plans to primary pro-shutdown Republicans.

Via talking points memo:

Concerned [about the impact of the shutdown and the possible debt ceiling fight], the Chamber of Commerce is preparing to participate in political primaries, protecting friendly lawmakers from conservative challengers. "Clearly we're getting to a point where we need a Congress that's going to be productive, proactive and create a stable environment for economic growth and job creation," said Scott Reed, a Republican political consultant who is advising the chamber on its strategy.

My advice to President Obama would be to hang on. Victory is near.