It was Saturday, June 28 at 8:00 a.m. for about a half hour. I think that was his only visit. He was there to criticize Bush on the administration of the facility. Visiting the soldiers was secondary.
I don’t know if you’ve been there, but it is a gripping experience. These guys have just arrived from the hospitals in Germany. Freshly wounded,some fortunate to be surrounded by family, some in shock and some eager to get back to their team. The rehabilitation units are fantastic The technology and dedication to putting these injured veterans back together again is an extension of the valor displayed by our troops.
When he visited the troops at Walter Reed on June 28th, it was done as "Barack Obama, presidential candidate":
Presumptive Democratic nominee Barack Obama made a private, last-minute stop at Walter Reed Army Medical Center Saturday morning where he presumably visited with wounded veterans, though campaign aides both on and off site would not confirm, and a press pool was not allowed in the facility.
While the Illinois senator was inside, Obama's campaign simultaneously announced he would be making trips to both the Middle East and to Europe shortly this summer.