Vancouver Canucks hockey fans showed their disapproval of the United States by booing its national anthem at Rogers Arena on Sunday night.

The booing continued through most of the Star-Spangled Banner but it changed to rowdy cheers for the Canadian anthem.

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U.S. President Donald Trump’s tariffs against Canadian goods came into effect on Saturday.

Canada then hit back with a lengthy list of counter-tariffs of its own.

Prime Minister Justin Trudeau announced the measures — $155 billion worth — Saturday, in response to Trump’s executive order imposing tariffs on Canadian (and Mexican) goods.