It looks like our trade wars won't be limited to China. It seems the Obama Administration is picking on Air Canada, which is affecting charter flights for NHL teams for the upcoming season:

Canada’s six NHL teams are scrambling to find alternative travel arrangements south of the border after the U.S. Department of Transportation banned Air Canada’s charter fleet from flying between U.S. cities.

In a furious exchange with the Obama administration over the mid-August ruling, Canada has launched its own investigation and will soon close its skies to U.S. sports team charters in retaliation, warns Transport Minister John Baird.

The sticking point is an eight-year-old exemption that had allowed sports and celebrity charters to make several pit stops in American cities. Under existing open skies agreements, regular Canadian airline flights can only visit one U.S. city before returning.
[...]
Mr. Baird said the dispute "shows the power of anti-free-trade Democrats in the Congress" and cautioned his government will respond in kind.

"We've already directed the Canadian Transportation Agency to launch a formal inquiry and the next step will be a direction to the CTA to immediately prohibit charter flights by U.S. carriers under season-long contracts with professional sports teams with multiple stops in Canada," he said in an interview.

Teams will, of course, terminate their contracts with Air Canada and take their business to a US-based airline.