Trump threatens to block a US-Canada bridge and warns Canada over China trade deal

Trump has threatened to stop the opening of a new bridge connecting the United States and Canada. He also warned that the US would have a 'very substantial' response if Canada enacts a trade deal with China.

Former Canadian Prime Minister Stephen Harper warned about the threat from Trump and called for Canada to impose reciprocal tariffs. Some analysis suggests that while Trump's target is Canada, the economic impact could hit US states like Michigan.