10 Iconic Presidential Campaign Ads That Changed Political Advertising

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. According to SMG Delta, Clinton and groups supporting her have bought $45 million in ads for the general election, compared with $3 million spent in support of Trump—none of which came from the Trump campaign itself.

While Trump may not be convinced, Clinton is a firm believer in the power of political advertising on TV, which dates to the medium's earliest days. The most memorable spots (think Reagan’s “Morning in America”) have tended to come from winning campaigns—but not always.

From inspiring and positive to brutally negative and even, perhaps, unfair, here are 10 of the most iconic presidential spots, from Eisenhower to Obama.