Bush's drooping mouth = a stroke?

First there it was suggested that perhaps George W. Bush is suffering from presenile dementia. Now debate observers are suggesting that a suspicious droop on one side of the president's face in the third debate might indicate he has suffered a stroke.

The evidence is certainly circumstancial, but many interesting pieces do come together under such a hypothesis:

(1) Bush skipped his annual exam this year, just weeks before the election. Why?

(2) The president having suffered a stroke could explain his loss of verbal agility over the course of his presidency.

(3) Remember the strange bulge often seen on Bush's back (including in the first debate)? Daily Kos argues intriguingly that it may well have been a medical device to help the president's symptoms:

Now if you look at video from the FIRST debate, there is no droop. The right side of his face is pretty animated. Why? The thing on his back. Listen, I've put wireless mics and wireless IFBs (2 way transceivers) on talent for years. They're the size of credit cards now. That wasn't a transceiver on Bush's back. It was some kind of medical device. He wasn't wearing it last night, and that's why he was forcing himself to stand with such a rigid expression. The best he could muster.

So here's the thing - no one knows what the bulge is, or what specifically may be wrong with the president. But there's growing reason for concern that something's not right. The president should go in for his physical, and the White House should come clean on the bulge, which is so plainly visible. Is it a receiver? Is it a device to help control a medical condition? It's time to stop hiding this from the public, to end the speculation in the blogosphere, and to admit whatever is up.