Conference USA in negotiations to add three universities from Adam Stites, with YardBarker.com/www.yardbarker.com Connecticut, New Mexico State and Liberty are all in negotiations to join Conference USA, according to Chris Vannini of The Athletic. Conference USA was recently plundered by other conferences adding to their ranks. The American Athletic Conference replaced its upcoming losses by announcing that six Conference USA schools — UAB, Florida Atlantic, Charlotte, North Texas, Rice and UTSA — would all be joining its ranks. Conference USA also lost Southern Mississippi and Old Dominion to the Sun Belt Conference. Liberty and New Mexico State are set to…