This middle 50% has been hammered by the negative press and RAT mischief making. Probably 15-20% that supported Iraq initially have serious doubts because of the drumbeat of negativity. Having good news to report, and having it reported, makes all the diference in the world to that 15-20%. W's welcome refutes, in a full color way, the cr@p about occupation.
Some folks have no interest in the issues, they make their decisions based upon their read of the guy they hire to handle it. For a lot of those people, they'll get a reminder that W is a gutsy and daring guy. It reminds them of why they voted for him in the first place. Don't underestimate the power of likeability. It's wasn't Clinton's policies that kept him popular; it wasn't his being a scoundrel. He was a likeable scoundrel.
This was a devastatingly successful trip.
I have to admit, the drumbeat's gotten to me more than once. I've had my moments of doubt and complaint. But I've never doubted that I voted for the right guy in 04, and I've never seen failure in Iraq as a viable option. I just haven't always been sure we'd succeed. Plus, my fundamental distrust of gubmint has made me skeptical about it, too. But I've always tried to hang in there and see what happens. And really, with the DEM party being what it is, it's not like we have a choice anyway.