From your link:

In a statement, Brian Fallon, a spokesman for Mrs. Clinton’s presidential campaign, said no one “has ever produced a shred of evidence supporting the theory that Hillary Clinton ever took action as secretary of state to support the interests of donors to the Clinton Foundation.” He emphasized that multiple United States agencies, as well as the Canadian government, had signed off on the deal and that, in general, such matters were handled at a level below the secretary. “To suggest the State Department, under then-Secretary Clinton, exerted undue influence in the U.S. government’s review of the sale of Uranium One is utterly baseless,” he added.