It’s a lot easier to run a slashing, negative campaign when you’re completely, totally, unbelievably oblivious to your own faults:

The Obama campaign is opening a new front in its war against GOP rival Mitt Romney, ABC News has learned, with planned attacks to begin this week on Romney’s record as governor of Massachusetts and the campaign promises Democrats say he left unfulfilled.
Team Obama will point to Romney’s rhetoric on job creation, size of government, education, deficits and taxes during the 2002 gubernatorial campaign and draw parallels with his presidential stump speeches of 2012. The goal is to illustrate that Romney has made the same promises before with unimpressive results, officials say.

Ah, charges of unfulfilled promises from President Barack “If I don’t have this done in three years, then this is going to be a one-term proposition” Obama, the man who pledged who cut the deficit in half in his first term, the man who criticized Hillary Clinton’s proposal for a mandate requiring Americans to purchase health insurance, is going to hit his opponent on broken promises.

Four years ago this week, Obama said — with profound humility, he assured us — that future generations would look back and say, “this was the moment when we began to provide care for the sick, and jobs for the jobless, this was the moment when the rise of the oceans began to slow, and the earth began to heal . . .” and now he tells us to beware of politicians bearing grandiose promises.

Obama 2012: Stick with the broken promises you know.

UPDATE: The problem with a post like this is that inevitably readers ask, “Hey, wait, what about this promise?” that was broken/reached its expiration date — Gitmo, “no lobbyists in my White House,” any of the president’s plans to mitigate the foreclosure rate, his promise to double funding for cancer research, his pledge to provide five days of public comment before signing any bills, his pledge to support another mission to the moon by 2020 . . .