The Globe and Mail reports in its Monday edition that even as U.S. President Donald Trump talks of waging a campaign of "economic force" to make Canada submit to becoming the 51st state, Ontario Power Generation is preparing to construct an American reactor at its Darlington nuclear power station. The Globe's Matthew McClearn writes that the reactor's uranium fuel would be enriched at a plant in New Mexico, a new vulnerability U.S. administrations could exploit. Canada's 17 operating reactors are of the homegrown Candu design, which consume natural uranium. Canada possesses uranium in abundance and has long made its own fuel, but nearly all the reactors promoted for construction now require enriched uranium, which Canada cannot produce. Proposals by Canadian utilities to build new reactors attracted American vendors, including GEHitachi Nuclear Energy (which is designing the BWRX-300, planned for deployment at Darlington and in Saskatchewan), Westinghouse Electric Co. and ARC Clean Technology. Until the past few months, the risks of the U.S. government weaponizing nuclear fuel against allies for political purposes seemed distant. Now it is just one more aspect of Canada-U.S. relations that Mr. Trump has disrupted.