Correct. He waited until he knew there were sufficient votes for cloture and comes out in support of a filibuster. Only positives in it for him.
You think being shown to be a blowhard and ineffective (yet again) is a "positive" for Kerry amoung non-DU voters?
Yes. I'll pick the Steelers and the Seahawks to play in SuperBowl XL. The folks in Pittsburgh and Seattle will love me.
I voted for cloture before I voted against it!