Sarah Palin is giving indecision a bad name. Not only can't she decide whether to run for president, this week she even waffled over whether to keep a date to speak at a "tea party" rally in Iowa on Sunday, a Sarah-palooza her devotees have been organizing for weeks. Every other serious Republican presidential hopeful has already decided, one way or the other. But Palin? The former Alaska governor surfaces without warning every month or so, like the Loch Ness monster, to let her supporters know she still exists. She insists that she has what it takes to run for...