If I remember correctly the last couple of resolutions to the self created crisises, if you can call it that, not only sent the market higher, but were the catalyst to send the market to all time highs.
The interesting pattern Ive noticed is the market sells a little at first as the media first reports and fearmongers us about how the world is gonna end unless we resolve the crisis, then the market starts moving up on "hope" as the deadline approaches... to the point where the market is higher than where it was when the crisis was first being discussed!
If I remember correctly the morning the government shutdown we were at about 1680 on the ES... so through 2 weeks of government shutdown, constant fearmongering about an imminent US default, bad economic data points (empire set and consumer confidence), lackluster earnings, big companies warning and guiding lower... the ES is currently at 1704 and looking ready to explode with less than 15 hours till supposed armageddon.
There might be a very short term sell off on the news, but if theres some type of resolution I would have to think the market will quickly get back into low volume float up mode... this market is pretty much all driven on QE as it has been for a while.