Instapundit expects a government shutdown - but doubts it will go as Democrats expect.
Another risk is that a shutdown will contribute to an already growing sense of chaos and incompetence at the top. Obama can blame Republicans all he wants, but his party controls the White House and one house of Congress -- two-thirds of the elected levers of power in Washington. If he can't run the country with the White House and the Senate ... well, maybe he just can't run the country. After Syria, he's lost a lot of credibility abroad; if he can't keep the government from shutting down at home, he's likely to lose credibility here as well, no matter how much finger-pointing he does. Ultimately, if the country seems to be in chaos, it's the president who gets blamed.