White House economic adviser Kevin Hassett said on Sunday he was hopeful a dispute with Canada over accusations of the deadly fentanyl opioid entering the U.S. across its northern border could be resolved by the end of March.

Trump at first imposed 25% tariffs on Canadian and Mexican exports to the U.S., then exempted the duties on Mexican- and Canadian-made vehicles being transported into the U.S. and later by week’s end delayed the tariffs on almost all items for four weeks until April 2.

President Donald Trump said tariffs on some goods from Canada and Mexico planned for April 2 “could go up,” and would not predict whether the United States will have a recession in 2025.

Canadian and Chinese officials say they were already helping reduce fentanyl smuggling. Prime Minister Justin Trudeau said fentanyl crossing the northern border is "near zero."

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

Trump and his aides have reportedly threatened to redraw the northern border, go after Canada’s minerals and water, and cancel NORAD.

Kevin Hassett, the Trump administration’s National Economic Council director, said the United States has not launched a trade war with Mexico and Canada but “a drug war.” Hassett joined ABC News’s “This Week,

U.S. President Donald Trump will not let up his pressure on tariffs on Mexico, Canada and China related to their handling of fentanyl, U.S. Commerce Secretary Howard Lutnick said on Sunday. "If fentanyl ends,