Speaking out of both sides of one's mouth is an occupational hazard, if not an occupational necessity, for politicians seeking elective office in competitive races. It's not a pretty sight, and it supports a cynicism about democratic politics that is unbecoming. Catering to such cynicism, the leftist writer Garry Wills used to advise college audiences, "Vote for your enemy--he has no one to sell out to but you." The political debate over the use of the Senate's filibuster rule to torpedo President Bush's judicial nominees has triggered a series of reversals and pratfalls that support the low-comedy version of democratic...