Kevin McCarthy begins ‘revenge tour’ by supporting Rep. Nancy Mace’s primary challenger

NBC News Correspondent Ali Vitali explains why former House Speaker Kevin McCarthy (R-Calif.) is supporting Rep. Nancy Mace’s (R-S.C.) challenger in the Republican primary for South Carolina’s first congressional district. » Subscribe to NBC News: NBC News Digital is a collection of innovative and powerful news brands that deliver compelling, diverse and engaging news stories. NBC News Digital features , , , Nightly News, Meet the Press, Dateline, and the existing apps and digital extensions of these respective properties. We deliver the best in breaking news, live video coverage, original journalism and segments from your favorite NBC News Shows. Connect with NBC News Online! Breaking News Alerts: Visit : Find NBC News on Facebook: Follow NBC News o