Early last year, Gov. Ron DeSantis nestled into his chair onstage in Naples, Fla., to explain to an audience of the would-be conservative elite his journey through the reigning liberal one they hoped to destroy. His host was Larry P. Arnn, the president of Hillsdale College, a small Christian school in southern Michigan that has become an academic hub of the Trump-era right. His subject was Yale University, where Mr. DeSantis was educated and where, as he tells it, he first met the enemy. 214