Trump during his address to Congress said that Canada and Mexico ‘have allowed fentanyl to come into our country at levels never seen before.’

President Trump said Mexico and Canada must do more to stop the flow of fentanyl into the U.S. A bootleg version of the synthetic opioid, largely produced by Mexican cartels, has created a public health overdose crisis in the U.

Trump's tariff moves have caused a gaping wound in the decades-old North American trade partnership, have also caused the stock market to sink and alarmed U.S. consumers.

Many imports from Canada and Mexico will be exempt from tariffs, as the president quickly reversed a sweeping trade action taken just two days ago after market turmoil.

Mexican and Canadian officials are increasingly frustrated by tariff negotiations with the Trump administration, with a lack of clarity over exactly what the U.S. wants making any resolution seem impossible,

President Trump delayed tariffs for both countries after Mexico’s leader presented her security successes, and after U.S. markets fell and business leaders urged the White House to change course.

The taxes proposed by Trump have caused a gaping wound in the decades-old North American trade partnership, and Canada has felt compelled to quickly take aggressive countermeasures.

While President Donald Trump has said the tariffs are meant stop the flow of drugs across the border, experts worry it may undermine progress already underway.

"American importers pay the tariffs and then do everything they can to pass that cost on to American consumers," John Bolton said.