The segment was surprising given that a number of broadcasters on Smith's own network have promoted the idea that Clinton broke the law in approving the sale to foreign buyers who also donated to her husband's foundation.
The Fox News host began the segment by summarizing the particulars of the sale of Uranium One, a Canadian firm with rights to mine United States uranium. OK'd that sale - of Russian "bribery, kickbacks, extortion and money-laundering" meant to "grow" Vladimir Putin's nuclear interests in America.
The State Department has one of nine seats on a body that advises the president on proposed sales of US assets that could have national security implications.
Senate Republicans who launched the investigation into Clinton's role in the deal had kept the informant's name secret, and his lawyer had declined to reveal his identity.
Shepard Smith, who has been at Fox for more than two decades, discredited the theory which his own network has branded the Clinton uranium "scandal" in a five-minute segment. They say Ms Clinton in exchange approved the sale to the Russians - a "a quid pro quo".
The conspiracy theory was first floated by Peter Schweizer, the senior editor-at-large of far right publication Breitbart, in his 2015 book Clinton Cash. The reporter noted the Clinton State Department did not possess the power to either veto or approve such a transaction.
The lobbyist, William Campbell, told Reuters he is the informant who will testify before Congress about the 2010 sale of Uranium One, a Canadian company with uranium assets in the us, to the Russian state-owned nuclear giant Rosatom.
2017 red kettle campaign kicks off
Funds raised from the campaign are not just for Christmas but help with the work the local Corps does in the community. Red Kettles will be located throughout Emporia at Wal-Mart, Hobby Lobby, Graves Drug, Bluestem and Sutherlands.
The right says the Obama-era Uranium One deal and its ties to the Clintons are a smoking gun.
"The accusation is predicated on the charge that Secretary Clinton approved the sale".
'She did not. A committee of nine evaluated the sale, the president approved the sale, the Nuclear Regulatory Commission and others had to offer permits, and none of the uranium was exported for use by the USA to Russian Federation'. Mr. Smith pointed that out methodically and dispassionately, and now he's getting no end of grief for it, with Fox News viewers taking to Twitter to accuse him of broadcasting fake news, being a closet Democrat or (horrors!) belonging on CNN, not Fox.
'You need to get that hack out of Fox News, ' tweeted another viewer.
If prosecutors do appoint a special counsel, speculation could arise with regards to the independence of federal investigations under President Trump. But she said she was not personally anxious about being prosecuted.
PolitiFact found that the majority of the donations from individuals related to Uranium One and UrAsia were made before and during Clinton's 2008 presidential campaign - but before she became secretary of state in 2009.
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