I was all set to defend President Bush as a guy who really doesn't want poor black people in Louisiana and Mississippi to die of starvation and disease, no matter what the Democrats say.But then Barbara Bush, the president's mom, went and dusted off the Bush family silver foot Monday. And she used it. While touring the Houston Astrodome, where thousands of Hurricane Katrina refugees have been huddling, Barbara Bush said they didn't have it so bad because, heck, they were poor to begin with. "What I'm hearing, which is sort of scary, is they all want to stay in...