https://www.vox.com/world/2017/2/17/14649980/trump-clinton-russia-uranium
But the claim that Clinton gave 20 percent of America’s uranium to Russia is incorrect and clearly misleading. Trump is referring to Russia’s nuclear power agency purchasing a majority stake in a Toronto-based energy company between 2009 and 2013. The company had mines and land in a number of US states with huge uranium production capacity — a move the US State Department signed off on. But PolitiFact did a thorough fact-check of the claim last year when Trump first made it on the campaign trail, and found the following faults with it:
The mines, mills, and land the company holds in the US account for 20 percent of the US’s uranium production capacity, not actual produced uranium.
The State Department was one of nine federal agencies and a number of additional independent federal and state regulators that signed off on the deal.
President Obama, not Secretary Clinton, was the only person who could’ve vetoed the deal.
Since Russia doesn’t have the legal right to export uranium out of the US, its main goal was likely to gain access to the company’s uranium assets in Kazakhstan.
Crucially, the main national security concern was not about nuclear weapons proliferation, as Trump suggests, but actually ensuring the US doesn’t have to depend too much on uranium sources from abroad, as the US only makes about 20 percent of the uranium it needs. An advantage in making nuclear weapons wasn’t the main issue because, as PolitiFact notes, “the United States and Russia had for years cooperated on that front, with Russia sending enriched fuel from decommissioned warheads to be used in American nuclear power plants in return for raw uranium.”