AP Photo

In his 30-year public career, Perry​—​how to put this delicately?​—​has shown no sign of being tortured by a gnawing intellectual curiosity. “He’s not the sort of person you’ll find reading The Wealth of Nations for the seventh time,” said Brooke Rollins, formerly Perry’s policy director and now president of the Texas Public Policy Foundation, a free-market research group closely allied with Perry. At Texas A&M he majored in animal science and escaped with a grade point average a bit over 2.0. (Perry’s A&M transcript was leaked last month to the left-wing blog Huffington Post by “a source in Texas,” presumably not his mom. How his GPA compares with Barack Obama’s is unknown, since no one in higher education has thought to leak Obama’s...