Senator Lindsey Graham has urged President Donald Trump's personal lawyer Rudy Guiliani to vet his intelligence on former vice president Joe Biden, his son Hunter, and alleged Ukraine corruption, to make sure that it's 'not Russian propaganda'.

The Republican lawmaker's advice comes after Guiliani said he compiled a massive report on the Bidens that could verify the president's concerns about corruption that he wanted Ukraine's President Volodymyr to investigate in the July 25 phone call that led to Trump's impeachment in the House.

Giuliani returned from Kyiv, Ukraine's capital, last month after meeting with former general prosecutors and parliamentarians who've been known to peddle Russian conspiracy theories, including supposed plots that suggest Ukraine intervened in the 2016 US presidential election and the Bidens.

Senator Lindsey Graham (pictured) has urged President Donald Trump's personal lawyer Rudy Guiliani to vet his intelligence on former vice president Joe Biden, his son Hunter, and alleged Ukraine corruption, to make sure that it's 'not Russian propaganda'.

Rudy Giuliani returned from Kyiv, Ukraine's capital, last month after meeting with former general prosecutors and parliamentarians and has said he's put together a massive report on former vice president Joe Biden, his son Hunter, and alleged Ukraine corruption

The president's personal lawyer briefed Trump about his findings upon his return to Washington, two sources with knowledge of the conversation told the Daily Beast.

Guiliani later said publicly that Trump asked him to relay the intelligence to GOP lawmakers. 'He wants me to do it', said Guiliani on December 10, the Washington Post reports.

'I'm working on pulling it together and hope to have it done by the end of the week'.

But lawmakers on both sides of the aisle and administration officials have privately worried Giuliani's intelligence might be based on Russian misinformation, especially since it was the president's personal lawyer's own efforts that helped create the Ukraine scandal that triggered the impeachment inquiry.

Both Democrats and Republicans are reportedly avoiding Giuliani, concerned that his sources are the same ones who've been known for spinning the truth and outright lies.

'He has not shared any of this information with me', Graham, the Senate majority leader told the Daily Beast about the intelligence Giuliani brought back from his latest trip.

'My advice to Giuiliani would be to share what he got from Ukriane with the IC [Intelligence Community] to make sure it's not Russian propaganda,' Graham said. 'I'm very suspicious of what the Russians are up to all over the world'.

Guiliani responded to Graham's suggestion by saying flatly, 'It's not Russian propaganda', reports the Washington Examiner.

President Donald Trump's personal lawyer Rudy Giuiliani briefed President Donald Trump (pictured) about his findings on a November trip to Kyiv, Ukraine's capital, where he met with former general prosecutors and parliamentarians

President Donald Trump's personal lawyer Rudy Giuiliani, denies that his intelligence on former vice president Joe Biden (right) and his son Hunter (left) and alleged Ukraine corruption is 'not Russian propaganda'.

The former New York City mayor on his trip to Kyiv met with Andriy Derkach, who is a self-described political independent who attended the Dzerzhinsky Higher School of the KGB in Moscow and was for a time a member of the pro-Russia party -- the Party of Regions -- in the Ukrainian parliament, reports the Daily Beast.

He also met with Oleksandr Dubinsky, a member of the parliament known for his close ties to controversial Ukrainian oligarch Ihor Kolomoisky. He and Derkach are known for disseminating conspiracy theories on Facebook and elsewhere.

President Donald Trump's lawyer Rudy Giuiliani is pictured with Andriy Derkach, who is a self-described political independent who attended the Dzerzhinsky Higher School of the KGB in Moscow and was for a time a member of the pro-Russia party in the Ukrainian parliament

The Daily Beast obtained a dossier that it said debunked a claim that Ukraine intervened in the last US presidential election, a claim disseminated by Kerkach to Americans, including senior officials, close to Trump.

That claim and others were aired on One America News shortly after Giuliani's visit in a documentary-style show, reports the Daily Beast.

The news outlet traveled with Giuliani to Ukraine for his meetings with Derkach and Dubinsky, are currently working on an upcoming segment.

Senator Bob Menedez, a Democrat representing New Jersey, said Guiliani 'long ago lost any shred of credibility, especially after the dossier he assembled for the State Department stunningly mirrored Russian propaganda', reports the Daily Beast.

'Knowing that, anyone that attempts to defend President Trump's behavior by citing Rudy's information over our own intelligence agencies is simply irresponsible, uninformed or willing to be that useful idiot the Kremlin desires'.