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Presidential campaigns have a history of producing memorable television ads that have helped sway public opinion and win elections. But many of the old rules of campaigning have been broken in 2016's decidedly unusual election season—most often by Republican presidential nominee Donald Trump, who's so far eschewed the idea of producing influential political ads and leaned on free media instead.
Trump’s opponent, Hillary Clinton, has dominated ad spending so far, swamping the GOP's candidate by a 15-to-1 margin.