 compared to his slack-jawed, empty-eyed, vacant, staring debate and his incoherent rambling interview with George Stephanopoulos, he got a D+. But I'm not grading on the curve. The president was awful in many ways last night. Not as bad as his slack-jawed, incoherent debate performance, but grading on the curve, Joe Biden can shuffle forward. It's possible for him to shuffle forward. Aaron Blake of The Washington Post.