He'll probably get a slight uptick from the joint address (Unless his teleprompter bursts into flame and he embarasses himself by trying to speak extemporaneously), but not anything that'll last. Americans want to think well of people.
Americans WANT to think well of people, but they're tired of the shit this clown is dishing out, and they're responding to it. No uptick.
Especially on the night football starts. You know 1--he's going to start late, 2--he's going to run long.
Couple that with the comments made by Hoffa, et al, over the weekend and the absolute refusal of the WH and the Dems to distance themselves from such rhetoric (hell, Obama even dished a bit of it out himself in Detroit) and people just shake their heads and give up on the guy. I'm looking at Thursday to be Obama's "malaise" speech. When that happens, he might as well write off his chances at 2012 right then and there.