The Big East Conference and American Athletic Conference are not in the Power Five, but are considered high-major conferences. Also sometimes branded as high-majors are the Atlantic-10 Conference and the Mountain West Conference. Additionally, one men's program outside of these conferences, West Coast Conference member Gonzaga, is generally considered "high-major" today. Given the sustained success of many so-called "mid-major" conferences, higher profile conferences find it more difficult to distinguish themselves with the "mid-major" and "major" labels, unless one takes into account the distinction of being in now-defunct BCS football playing conference. However, only one team from a mid-major conference has won a national championship since the tournament expanded to 64 teams—UNLV in 1990 as a member of the Big West Conference. (Louisville won national titles in 1980 and 1986 as a member of the Metro Conference, one of the precursors to Conference USA and arguably a major basketball conference of that day.) As a convenient shorthand, the term "high major" basketball conference is often synonymous with the college football Power Five conferences:  These leagues, along with the Big East, were the six so-called AQ ("automatic qualifying") conferences during the Bowl Championship Series (BCS) era in college football. Following the breakup of the Big East and end of the BCS era, the remaining five are the primary members of the College Football Playoff (CFP) structure that began in the 2014 season. The CFP is centered around a group of bowl games often called the "New Year's Six", with two of them hosting CFP semifinals each season in rotation. Football champions of these conferences are assured of a spot in a "New Year's Six" game, though not necessarily in a CFP semifinal. The two leagues that resulted from the 2013 split of the original Big East Conference—the football-sponsoring American Athletic Conference and non-football Big East Conference—are often considered to be major basketball conferences as well. When the original league split along football lines, the seven non-FBS schools, plus Creighton, Butler, and Xavier, founded the current Big East while the three remaining FBS schools, Cincinnati, UConn, and Temple, became The American. In every year since the split, the "new" Big East has been ranked a top five basketball conference by leading analysts such as Ken Pomeroy. Villanova won the men's basketball national championship in the 2015-2016 and 2017-2018 seasons.