In early 1962, Walker campaigned to become governor of Texas and lost the Democratic primary election to the eventual winner, John Connally. In October 1962, Walker was arrested for promoting riots at the University of Mississippi in protest against the admission of black student James Meredith into the all-white university. Attorney General Robert F. Kennedy ordered Walker committed to a mental asylum for a 90-day evaluation, but psychiatrist Thomas Szasz protested and Walker was released in five days. Attorney Robert Morris convinced a Mississippi grand jury not to indict Walker.