Three University of South Alabama students were arrested Friday over alleged threats against President Donald Trump ahead of his evening rally on the Mobile campus, a source familiar with the matter told Fox News.The students were each charged with threatening the president over social media posts allegedly made in the days leading up to Trump's visit, according to the Lagniappe Daily.The federal cases were unsealed Friday afternoon, just hours before Trump was scheduled to take the stage at the university's Mitchell Center, the outlet reported.OHIO MAN CHARGED OVER GRAPHIC THREATS TO KILL TRU...