I remember now!
It was the one where Obama was quoting a statemnt by John McCain and they edited out the "John McCain said..." part so it would sound like the statement was Obama's. Taken out of context that way, it was outrageous that Obama would say something like that.
At issue is this soundbite that the Romney campaign used from Obama: "If we keep talking about the economy, we're going to lose."
In fact, Obama that day was quoting an unnamed campaign advisor for Sen. John McCain, the Republican nominee. The full quote: "Sen. McCain's campaign actually said, and I quote, if we keep talking about the economy, we're going to lose."
I guess anything goes if you're fighting godless Communism, eh?