We already have a disarmament treaty with Russia and Fact Check: false claim.

"So, Clinton could have objected — as could the eight other voting members — but that objection alone wouldn’t have stopped the sale of the stake of Uranium One to Rosatom. “Only the President has the authority to suspend or prohibit a covered transaction,” the federal guidelines say.

"And the president would need to have “credible evidence,” the guidelines say, that the “foreign interest exercising control might take action that threatens to impair the national security.” In 2010, when the deal was finalized, “the geopolitical backdrop was far different from today’s,” the Times notes, as the U.S. wanted to “reset” relations with Russia....

"Committee members include the secretaries of the Treasury, Defense, Homeland Security, Commerce and Energy, the attorney general, and representatives from two White House offices — the United States Trade Representative and the Office of Science and Technology Policy."