GAINESVILLE — Students and faculty at the University of Florida gave U.S. Sen Ben Sasse a raucous welcome to campus Monday, greeting the Nebraska Republican with biting questions and a loud protest as he sought to introduce himself as the school’s likely next president. Introduced last week as the only finalist for the job, the 50-year-old Sasse faced opposition to his stances against same-sex marriage, his past efforts to do away with tenure and a decision by UF leaders to keep much of the selection process secret. During the second of three public forums, about 200 student protesters crowded into...