What happened Aug-Nov 2011?

Hi. I’m puzzling over something in historical right-track/wrong-track US polls. Generally, the sentiment is negative (wrong track) and this is normal. As I write this, it’s at 57.6% negative, which is about normal or even low. But in August 2011, the wrong-track number leaped to 75% negative quite suddenly.

I’m wracking my brain trying to come up with what changed in that particular quarter. Sandy Hook wasn’t until the following year. I can’t come up with a political event right about then (Obamacare’s passage and the GOP getting a boost from it was the previous year/election). The other sharp sentiment jump (-74.9%) in mid October 2013 seems obviously tried to the government getting shut down, but there wasn’t a shutdown in 2011. I must be forgetting something obvious for that period. Anybody?

United States debt-ceiling crisis of 2011

Aha, Nemo. That must be it, thanks. I’d forgotten the 2011 budget nonsense since the government didn’t actually shut down, but it was the same sort (and perhaps even more dangerous sort) of nonsense as in 2013.