The average American has little knowledge of the extent to which our institutions of higher learning have been infected with a spreading cancer. One aspect of that cancer is akin to the loyalty oaths of the 1940s and '50s. Professors were often required to sign statements that affirmed their loyalty to the United States government plus swear they were not members of any organizations, including the Communist Party USA, that sought the overthrow of the United States government. Fortunately, the U.S. Supreme Court struck down loyalty oaths as a condition of employment in 1964. Today we're seeing the re-emergence of...