The Contenders - 16 for '16

The Flamethrowers (1x2)

:

Sometimes the two U.S. political parties face challenges from insurgents within their own ranks. In 1992, conservative commentator Patrick J. Buchanan took on a sitting president of his own party he felt had betrayed its principles. Vermont governor Howard Dean lead a 2004 uprising that did not prevail on the ballot but altered the political landscape for future Democratic campaigns.