It is the latest in the ongoing probe of how the younger Biden made millions of dollars overseas and whether his father, the current president, improperly benefited from those dealings. For months, Republicans have searched for a connection to tie the two men together.

The White House has alternately insisted that President Biden never discussed business with his son and also that he was never in a business relationship with him. And there is not yet evidence that the president either profited from Hunter Biden's overseas business activity or took actions in his official capacity because they would benefit the Bidens.

But Oversight Chairman James Comer believes he may soon find a link: flight manifests.

"Devon Archer, a longtime Biden family associate, has stated it is 'categorically false' that Joe Biden played no role in his son's foreign business dealings," Comer wrote in a Wednesday letter to the Archives obtained early by RealClearPolitics.