Moderates triumphed at the '76 convention but their candidate, Ronald Reagan, lost the general election in the fall, Anthony Camerano/AP hide caption

itoggle caption Anthony Camerano/AP

Karl Rove, former adviser to President George W. Bush, speaks last year in Corpus Christi, Texas. Rove is the chief fundraiser for the biggest outside spender this election season: the twin groups American Crossroads and Crossroads GPS. Michael Zamora/AP hide caption

itoggle caption Michael Zamora/AP

Costumed demonstrators on Oct. 3 in Denver, before the first presidential debate. Doug Pensinger/Getty Images hide caption

itoggle caption Doug Pensinger/Getty Images