US President Donald Trump has threatened to stop the opening of the Gordie Howe International Bridge, a $4.6 billion project linking Detroit, Michigan, and Windsor, Ontario. Trump demands that Canada give the US at least 50% ownership of the bridge and other conditions before it opens. "I will not allow this bridge to open until the United States is fully compensated for everything we have given them and, importantly, until Canada treats the United States with the fairness and respect we deserve," Trump wrote on social media Monday. He added, "We will start negotiations, IMMEDIATELY. With all that we have given them, we should own, perhaps, at least one half of this asset." The Gordie Howe Bridge is expected to open in early 2026. It is designed to reduce heavy truck traffic on the Ambassador Bridge and could save truckers an estimated $2.3 billion over 30 years by cutting crossing times by up to 20 minutes, according to a University of Windsor study. The project was negotiated by former Michigan Governor Rick Snyder and financed by the Canadian government. On January 30, the US Department of Homeland Security recognized the bridge as an official port of entry. Michigan Senator Elissa Slotkin warned, "Cancelling this project will have serious repercussions – higher costs for Michigan businesses, less secure supply chains and, ultimately, fewer jobs." This conflict is part of a wider US-Canada spat, with Trump threatening tariffs on Canadian goods and opposing several trade deals. Trump previously warned he would impose a 100% tariff on Canada if it continued a trade deal with China. The tensions come as the US and Canada prepare to renegotiate the United States-Mexico-Canada Agreement (USMCA).