This is nuts.
The article focuses on the Canadian tribe, and how Canadian law doesn’t permit them to dodge Canadian taxes. The idea seems to be that American law might, so this could be a way to dodge Trump’s tariffs. But why would the Fort Peck Sioux expect Trump to honor a treaty that defeats his tariffs? The US doesn’t have a good track record on that to begin with, and Trump certainly wouldn’t give a shit. The Fort Peck Reservation doesn’t even border Canada directly. If this isn’t stopped at the Canada/US border, it’s because Trump is planning on sending in the US Army for an old-fashioned Indian massacre.