Washington (CNN) The Justice Department has begun vetting information from Ukraine obtained by President Donald Trump's personal lawyer Rudy Giuliani regarding former Vice President Joe Biden and his son, Sen. Lindsey Graham said Sunday.

Appearing on CBS' "Face the Nation," Graham said Attorney General William Barr told him earlier Sunday that the Justice Department has "created a process that Rudy could give information and they would see if it's verified."

The Justice Department declined to comment on Graham's statement Sunday.

Trump's attempts to pressure Ukraine to investigate Hunter Biden and Joe Biden, his potential political rival, were at the center of the impeachment investigation which ended with the President's acquittal last week.

The President has repeatedly made unfounded and false claims to allege that the Bidens acted improperly in Ukraine. There is no evidence of wrongdoing by either Joe or Hunter Biden.

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