New Delhi, Aug. 26 -- As trade talks fell through, the US and Canada are swords- drawn, with both blaming each other. Canada, as commentary suggests, is incensed by Washington wanting to meddle with which countries Ottawa forges ties with, an issue that sets US neighbours apart from others, given the context of convoluted value chains that US tariffs are causing; note how Mexico has been turning into a Chinese launchpad for the US market.

America accused Canada of raising last-minute demands, but didn't elaborate. Rhetoric around the rupture places Ottawa in the dock for wanting privileges as if it were America's 51st state. All this will be costly for both sides.

The White House has levied a 50% import duty on a clutch of Canada's good...