WASHINGTON, July 4 -- The broadcaster who spent years making Donald Trump's case to the largest conservative cable audience in America sat down with the Columbia Journalism Review this week and said he feels sorry for Trump, considers him a man who has lost control of his own decisions, and intends to do "everything I can" to build a rival political structure capable of breaking what he now calls a fraud masquerading as a democracy.

Tucker Carlson's interview, published Wednesday in the Columbia Journalism Review, is the clearest public declaration yet of where the anti-war faction of American conservatism is heading after the February strikes on Iran. Carlson has not spoken to Trump since the war began. He said he has no interest in doi...