As Canadian officials scramble to find clarity on Donald Trump's social media post announcing a 10 per cent increase to what he called "the Tariff on Canada," the U.S. president himself appears to be thin on the details.

Nearly two days after posting to social media the words "I am increasing the Tariff on Canada by 10% over and above what they are paying now," Trump has yet to say which of the various tariffs on Canadian exports to the U.S. will be hit, nor has his administration given Canada official notice of any tariff hike.

Aboard Air Force One on Monday, a reporter asked Trump when he expects the tariff increase to take effect.

"I don't know when it's going to kick in, and we'll see, but I don't really want to discuss it," Trump said.

He did, however, discuss at some length the

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