By BILL BARROW and THALIA BEATY

The Ronald Reagan Presidential Foundation and Institute is drawing a volatile mix of blowback and praise for arguing that a Canadian government advertisement playing in U.S. markets misrepresented the 40th president’s words to blast President Donald Trump’s tariff policies.

It is not clear how the California-based Reagan Foundation decided to enter the fray over the ad, which was purchased by Ontario Premier Doug Ford and used portions of a 1987 Reagan speech on trade in which he questioned the wisdom of using tariffs as economic policy. But shortly after the foundation said on social media that the ad misused “selective audio” of the former president, Trump cited the foundation when, in his own social media critique, he threatened to stop all trade wi

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