'"Ontario has forbidden bidding by US firms for Government contracts, and they've ripped up a contract with Elon Musk." [Verification and details, anybody?]'

Yes, on both counts. It's a 'Starlink' contract.

Tariffs will hit the auto industry particularly hard - on both sides of the border. That industry is a big element of both Ontario's and Michigan's economies, and is inextricably linked across the border: the parts of a vehicle and the incomplete vehicle itself may cross the border any number of times before the vehicle is ready for market. A 25% tariff every time makes the system unworkable. Predictions from those in the know are that the North American auto industry could be shut down within a week after tariffs are instituted.

Doug Ford, Ontario's Conservative Premier, came out swinging at the first mention of tariffs, and has continued his aggressive defence of his province's economy. There may well be a dose of political opportunism in what is otherwise, I think, genuine distress, and determination to defend his bailiwick. Before this American attack popped up out of nowhere, Ford had been under attack for some questionable moves, and he recently called an election, ostensibly to shore up support for his fight on tariffs; the Opposition accuses him of exploiting this situation to gain more political power, and to have it for an extra couple of years.