FOR A FEW FLEETING moments Monday night--what should have been vivid and affecting moments--television coverage of President Bush's final State of the Union address fastened on the image of a mother and daughter from Moshi, Tanzania. They sat, their faces alive with hope, in the first lady's box seats. Viewers were not told, and no one seemed inclined to tell them, that Tatu Msangi and her daughter Faith quite literally owe their lives to the Bush administration. After Msangi became pregnant, she went to a clinic at the Kilimanjaro Christian Medical Center and learned she was HIV-positive. Five years ago...