Republican Rand Paul is redoubling his efforts in his investigation into the man who led America's COVID-19 response, Dr. Anthony Fauci.

The Kentucky senator, who has grilled Fauci about the pandemic since 2021, is demanding that he be criminally prosecuted for lying to Congress in light of new shocking details about his presidential pardon.

Fauci was granted a preemptive pardon by ex-President Joe Biden as he left office, which could shield him from some consequences related to the pandemic.

But Biden admitted the pardon was signed by autopen, and not himself, raising questions about his mental state as he issued the sweeping relief for Fauci.

'If the President didn’t authorize this pardon personally, then the Department has a duty to investigate and prosecute as it would any ordinary citizen,' Paul wrote in a post on X made Monday afternoon, announcing his latest legal move against Fauci.