The US-Canada trade fight is escalating with harsh words on both sides, which is bad for auto workers and oil refiners but less urgent than it sounds because the new tariffs do not start until January.

• Trump says tariffs on cars, trucks, auto parts, and steel jump to 50% on January 1, giving both sides months to keep talking.
• Canada walked away from a deal, with Ottawa saying the US added last-minute demands, including limits on which other countries Canada could trade with.
• Commerce Secretary Howard Lutnick is blamed by both sides for blowing up the talks, and Canada never wanted to deal with him in the first place.
• Wildfires and maintenance in Canada's oil sands are cutting crude supply just as US Midwest refiners depend on it most.
• Republicans in farm and auto states like Maine, Michigan, and Iowa are turning against the trade and beef moves, warning of real damage at home.

Outlook: Expect more tough talk than action before January, but tighter oil supply and angry farm-state Republicans could force Trump to soften first.