Many Democrats took all this at face value and congratulated themselves for being smarter than the benighted Republicans. Here’s the thing, though: The Republican embrace of anti-intellectualism was, to a large extent, a put-on. At least until now.

Eisenhower may have played the part of an amiable duffer, but he may have been the best prepared president we have ever had — a five-star general with an unparalleled knowledge of national security affairs. When he resorted to gobbledygook in public, it was in order to preserve his political room to maneuver. Reagan may have come across as a dumb thespian, but he spent decades honing his views on public policy and writing his own speeches. Nixon may have burned with resentment of “Harvard men,” but he turned over foreign policy and domestic policy to two Harvard professors, Henry A. Kissinger and Daniel Patrick Moynihan, while his own knowledge of foreign affairs was second only to Ike’s.

There is no evidence that Republican leaders have been demonstrably dumber than their Democratic counterparts. During the Reagan years, the G.O.P. briefly became known as the “party of ideas,” because it harvested so effectively the intellectual labor of conservative think tanks like the American Enterprise Institute and the Heritage Foundation and publications like The Wall Street Journal editorial page and Commentary. Scholarly policy makers like George P. Shultz, Jeane J. Kirkpatrick and Bill Bennett held prominent posts in the Reagan administration, a tradition that continued into the George W. Bush administration — amply stocked with the likes of Paul D. Wolfowitz, John J. Dilulio Jr. and Condoleezza Rice.