This is why at the current rate things are going, I can't understand why anyone thought he was really going to change anything for the better. It was a pipe dream that many were dumb enough to buy into.
His charismatic speaking ability was only good for promising change. It's not going to work after 4 years of him going against his word. More people, mostly the swing voters are going to be "yeah, yeah, I've heard this shit before".
Here's my personal little could-be predition. Let gas sore up to $4 a gallon again and I predict his next approval rating would drop under 50%.
Even if the cause of the price spike had nothing to do with him, ie..China spikes up their purchase of oil, a few oil exporters have to cut back to sells (supply and demand).
Alot of people will still take it out on the President, which proves a point. I think alot of voters simply don't realize that alot of issues aren't something any President can snap their fingers and fix, it's a bigger issue that's out of their hands. This is why it's easy for would be Presidents to promise shit they know they can't come through on.
The housing issues is the best example. The citizens caused that. Yes, the government and lenders did rig it where we got sub-prime loans, but still, millions of people bought houses they knew they couldn't afford. Had the citizens been responsible and said "I know I'm approved, but I realize it's too expensive, I'll pass and keep renting until I have more income", then bam, we wouldn't have this problem.