Rudy Giuliani attacked former Vice President Joe Biden for showing “obvious signs of dementia” as he moves closer to locking up the Democratic presidential nomination.

“If you consider that what he’s displaying gets worse, what’s he going to be like three years from now? If he doesn’t know what state he’s in, he can’t figure out who his wife is, and if he thinks 150 million people, which is half the population roughly of America, got killed. Then what’s he going to be like two years from now when that illness gets worse?” Giuliani said during an interview on Fox News’s Watters’ World on Saturday.

Giuliani is the former mayor of New York City and President Trump’s personal lawyer.

Trump allies have zeroed in on Biden’s gaffes after he resurrected his campaign with a huge win in South Carolina last month, seeking to cast doubt on his mental acuity and physical stamina.

The blunder-prone Biden, who often travels to several states within a day, has misspoken which state he’s in while speaking to voters. He opened his Super Tuesday victory speech by confusing his wife with his sister. He also frequently stumbles over his words during debates.

“We shouldn’t pussyfoot around with this. The man has something wrong with him,” Giuliani claimed of the 77-year-old candidate.

Biden’s doctor released a report on the former vice president’s health in December that said he is being treated for an irregular heartbeat, high cholesterol, acid reflux, and seasonal allergies. His doctor added that Biden was a "healthy, vigorous, 77-year-old male, who is fit to successfully execute the duties of the Presidency." The report did not mention any declining cognitive ability or mental function.