It’s easy to laugh off the weekend’s Glenn Beck-Sarah Palin show at the Lincoln Memorial. Palin was her usual squeaky self. Beck was bombastic and self-important, explaining how God had assisted him in this enterprise, just as the almighty helped Moses lead the Jews out of Egypt. But don’t laugh just yet. The rally was a major event in the right wing’s effort to take over Congress and the presidency. It marked the end of a big conservative weekend in Washington. The other event was the two-day “Defending the American Dream Summit” of the Americans for Prosperity, an organization founded...