Former House Speaker Newt Gingrich (R-Ga.) once told me, “There is a small group of people who believe the same things. They are Republicans. Everybody else is a Democrat.” Lately, the small group has gotten smaller, as the thought police are hunting down heretics belying President Bush’s oft-stated goal of a big-tent party. The hunting season began when then-Senate Majority Leader Trent Lott (R-Miss.) was found dangling slowly from a tree in Washington, allegedly for endorsing a political party that had been dead for 40 years but really for failing to summon sufficient enthusiasm for the right-wing social and economic...