A senior adviser to Republican presidential nominee Donald Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE on Sunday said Democratic nominee Hillary Clinton Hillary Diane Rodham ClintonBiden leads Trump by 36 points nationally among Latinos: poll Democratic super PAC to hit Trump in battleground states over coronavirus deaths Battle lines drawn on precedent in Supreme Court fight MORE and her husband have "real connections" to Russia.

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"There's concrete evidence of the coziness between the Clintons and Russia," Boris Epshteyn said on Fox News.

Epshteyn slammed Clinton during the interview, calling her a lifelong liar before pivoting to the Democratic nominee and her husband's ties to Russia.

He called stories of the GOP nominee's links to Russia a "ridiculous narrative by the left."

"The Clintons are the ones that have real connections to Russia," he said.

"Because of Clinton's time as secretary of State and Bill Clinton William (Bill) Jefferson ClintonBattle lines drawn on precedent in Supreme Court fight Sunday shows - Ruth Bader Ginsburg's death dominates Bill Clinton on GOP push to fill Ginsburg vacancy: Trump, McConnell 'first value is power' MORE's time in office, Russians control one-fifth of the uranium that's produced in the United States of America."

He said former President Bill Clinton was paid $500,000 for a 90-minute speech he gave in Moscow and claimed Russian President Vladimir Putin called the former president personally to thank him.

News outlets, he says, are "grasping at straws" about Trump's relationship with Russia.

In the past, critics have accused Trump of sympathizing with Russia, pointing to the candidate's praise of Putin and to campaign staffers who have ties to Russia.

Trump has disputed claims that he has any financial ties to Russia.