As his candidacy gained strength, and once he had defeated Clinton for the Democratic Party nomination, attention shifted to Obama's ties to Alinsky. Monica Crowley, Bill O'Reilly, and Rush Limbaugh repeatedly drew a connection, with the latter asking, "Has ever had an original idea — by that, I mean something not found in The Communist Manifesto? Has he? Has he simply had an idea not found in Saul Alinsky's Rules for Radicals?" Glenn Beck produced a four-part radio series to expose Alinsky's "vision for a Godless, centrally controlled utopia." In "Barack Obama's Rules for Revolution: The Alinsky Model" (2009) David Horowitz argued "the roots" of his administration's "effort to subject America to a wholesale transformation" were to be found in the teachings of "the guru of Sixties radicals"—an Alinsky admonition to be "flexible and opportunistic and say anything to get power."