Why has this come up again?

After the 2016 election, the issue largely fell to the wayside, presumably because Ms Clinton was a private citizen and not a public figure running for office. But, a recent report in The Hill found that the FBI had been investigating whether Russia was attempting to gain influence in the American nuclear industry.

That report said that, at the time of the Uranium One approval, the FBI had already found substantial evidence that Russian nuclear officials had engaged in bribery, kickbacks, extortion, and money laundering to expand in the US.

But, that report also noted that the Justice Department had continued to investigate for nearly four years after its finding rather than telling the American public and Congress about Russia’s nuclear corruption in the US. During that time the Obama administration made two decisions that benefited Russia’s nuclear ambitions in America.

So far there is not any evidence that indicates Ms Clinton knew about the FBI investigation, and several officials have said they weren’t aware of the operation.

That includes an assistant FBI director in charge of criminal cases during investigations at the time, Ronald Hosko, who told the Hill he wasn’t aware of the investigation. Republican Representative Mike Rogers, the then-chairman of the House Intelligence Committee, also said that he wasn’t aware of the operation.