President George W. Bush may have unwittingly given homosexual activists just the boost they need to get state governments to pass domestic partnership laws, which put gay unions on an equal footing with marriage. OK. Perhaps I'm being charitable, but I would prefer not to believe it was a cold, calculated attempt to pander to yet another voting block. On Aug. 15, in an interview with CNN's Larry King, the president was talking about his support for a federal marriage amendment when King asked him, "What about the union of gays?" Mr. Bush said, "Well, that's up to the states,...