How will Democrats respond now?

It seems McCain, Giuliani and Romney have charged Clinton and Obama with being “anti-troops” because they voted against a blank check in Iraq for Bush.

So which is a better response?

(1) Say nothing, don’t “dignify it with a response” – you know, the way the Democrats were so successful in 2004 with the Swiftboat accusations.
(2) Say, “Unh, unh, no we aren’t! That’s not fair. Republicans are really mean to say stuff like that.” That’s the pervasive Democratic methodology ever since at least 9-11.
(3) Say something like, “Sorry, but John McCain, Rudy Giuliani and Mitt Romney are fast making themselves into lying slimeballs. They will stoop to any cheap accusation now, even when they absolutely know it’s false. A smart strategic move is not surrender. The only surrendering is what McCain, Giuliani and Romney have done to their Maximum Leader. They know perfectly well the foreign policy disaster that Bush and Cheney have personally created with their incompetence, and yet they are still too chicken to stand up to them.”