President George H. W. Bush's popularity in the aftermath of the successful 1991 Gulf War convinced many prominent Democrats to sit out the 1992 presidential election. With party leaders like Mario Cuomo and Dick Gephardt out of the running, the 1992 Democratic primary field consisted of relatively unknown candidates. Among those who sought the Democratic nomination were former Senator Paul Tsongas of Massachusetts, former Governor Jerry Brown of California, and Bill Clinton, who had served as the Governor of Arkansas since 1983. Clinton emerged as the front-runner for the nomination after the first set of primaries in February 1992. A founding member of the centrist Democratic Leadership Council, Clinton overcome opposition from more liberal Democrats like Brown and clinched the Democratic nomination in April 1992.