I really think what it comes down to is that most Americans feel as though 4 years isn't enough time to overcome the policy that George Bush put in place. Even though Obama hasn't fulfilled the promises he made during his 2008 campaign, regarding the economy, the majority of Americans are buying into his many excuses that the problem Bush created was much bigger than expected.
In a way, it will be interesting to see how Obama handles the next 4 years. As you mentioned Greeney, this time around, Americans have said "ok Obama, you get another chance, but you cannot ramrod your policies through, this time you will need bi-partisan support. Also, you cannot blame Bush anymore, it's all on you now."
I find it hard to believe that Obama will be able to make any real progress because he has created so much bad blood between party lines already. I think, in essence, we may have a lame duck for the next 4 years. The only way he will be able to get bi-partisan support on any policy is if we are in crisis mode; which may not be too far off. This is when there will be a lot of finger pointing and the left-extremists and the right extremists will be slandering each other in hopes of destroying the character of the other political party. All the while the moderates will be trying to make sense of the whole matter.
In the end, Obama will have not accomplished anything, we will be in 23 trillion dollar debt, Iran will be on the brink of acquiring (or will have already acquired) nuclear weapons, and the spirit of the middle class will be all but broken. More and more "Don't Tread on Me" bumper stickers will be seen and Americans will prepare to vote in an extremist Right Wing Conservative.
I'm disappointed because Romney offered a pleasant Moderate Conservative approach to the presidency (something we rarely get in a candidate). He also offered the traditional American values that we exemplified in our glory days. Unfortunately, we missed our chance, and most likely the Republican party will jump at the chance to elect an extremist once Americans hopes for "change" have been utterly defeated.
"a free society depends on a virtuous and moral people."