President Donald Trump's escalation of the trade war with Canada is coming at a bad time for Senate Republican candidates, who are being put in the awkward place of having to defend the administration's economic record while having to push back against Trump's targeting of critical Canadian imports and companies.

President Trump is not the first American president to feud with Canada. But today’s crisis might be the worst.

“Canada gets broad access into the massive American Government Procurement Market, including those of our States,” Trump wrote on his Truth Social platform. U.S. producers, the president argued, do not enjoy the same level of access in Canada’s government procurement schemes.

A Canadian province made clear that Donald Trump’s threats mean nothing to it. David Eby, premier of British Columbia, unveiled new signs Tuesday that will be displayed at border crossings in the Pacific Northwest and emphasize that the province will always be part of Canada.

One expert warns Trump's "very dangerous and very disruptive policies toward Canadians" spark uncertainty north of the border.

Trump's latest tariff exemptions amount to a tacit admission that the president's Canadian trade war is a political liability heading into November.

Canada’s supply management system shields its farmers from foreign price shocks. Farm groups say that leaves American producers more exposed.

A worsening trade war and a spike in oil prices could create new economic risks as the president prepares to rally Republicans for the midterms.