Pope Francis, whose pastoral career was devoted to serving the poorest and weakest in his spiritual care, has opened the door to the possibility of married priests in the Roman Catholic Church, Vanderbilt professor and papal scholar Dr. Bruce T. Morrill said Thursday while addressing the Rotary Club of McMinnville. That’s just one of the historic changes the new pope is contemplating or vigorously pursuing. Driving the Italian Mafia out of the Vatican Bank, reminiscent of Jesus’ expelling the money changers from the temple, is another of the reforms that have brought admiration from millions and strong opposition from others.