What should Obama do if Romney repeats his performance at the second debate?

[renate]

8. I don't think he has any choice but to call him on every single one

Maybe it was a lack of oxygen, maybe he was taken aback by the fact that Romney had decided to flat out lie like a rug in front of tens of millions of people instead of just his closed-door audiences, but his performance in the last debate cannot be repeated. It's not an option.

The silver lining (not the ten-dimensional chess move) of the first debate is that Romney got overexcited and his blatant lies are now on videotape. And I do believe that it was a deliberate decision not to say anything about the 47% or anything that might have allowed Romney to take back in front of a huge audience things he's been caught saying in private. But even if there's an upside to what happened in the first debate, if Obama lets Romney lie like that again he's going to look weak. He's not a weak president by any stretch of the imagination, but his performance in the debate was weak, and a second weak performance will start to establish a pattern that could hurt him in the polls.

I'm not worried; I'm much less worried about the second and third debates than I was about the first one, because this time I know he's going to be prepared for Romney to shamelessly lie on an epic scale and he'll come out swinging hard.