First was the way Romney's attack on President Obama about the Benghazi incident backfired.
Obama played this really, really well. He let Romney dig himself into an ever deeper hole, and just smiled when Romney tried to get him to directly deny it. This turned out to be either lucky or smart, because it gave Candy Crowley a chance to fact check Romney and confirm that she was there and she heard Obama refer to Benghazi as an act of terror on the very next day.
The second was in using a quote from Andrew Sprung on President Obama's response to the last question.
Lord-a-mercy, Obama just killed Romney on the 47%. Was it genius, or luck that he saved it for the end, when there was no time for rebuttal?
I've written before about this tendency to ascribe President Obama's success to luck. To be honest, what Drum did in these two instances is merely raise the question. So I don't want to be too hard on him. I just think it offers an opportunity to answer the question.
What we saw in both of these instances is a President who doesn't feel the need to jump the gun on the attack. As Drum noted in the first example, he was willing to let Romney dig himself in. And then, confident of his own position, he crushed him.
Ain't no "luck" about any of that...its pure genius.