Pow! Wham! The Republicans unleashed a doozy -- one of the most stunning surprises that I have ever witnessed in my adult life. By lunchtime, Obama's triumph of the night before had been wiped right off the national radar screen. In a bold move I would never have thought him capable of, McCain introduced Gov. Sarah Palin of Alaska as his pick for vice president. I had heard vaguely about Palin but had never heard her speak. I nearly fell out of my chair. It was like watching a boxing match or a quarter of hard-hitting football -- or one of the great light-saber duels in "Star Wars." This woman turned out to be a tough, scrappy fighter with a mischievous sense of humor.