According to the local paper:

Bush is coming to Yuma to see the problem of illegal immigration first-hand. He is scheduled to tour the border, visit the Border Patrol's Yuma Sector headquarters and meet local officials. He will also make remarks at a press briefing.

Obvious to anyone who's looked into this matter, Bush is a major part of the problem; in effect he's going to be taking a look at his handiwork. The Q&A session will also reportedly be very short, and won't give the MSM the chance to ask those damning questions that we know they could come up with if only they had more time.