Concern is growing about the health of US Senator Mitch McConnell, a top Republican lawmaker who has been in the hospital for more than three weeks.

McConnell, 84, was admitted for treatment on June 14, according to his staff. His collaborators have not given any details about the reason for his stay in the hospital or the type of treatment he is receiving.

His team said July 2 that he was “receiving excellent care” and “continues to improve.”

On Tuesday, several Republicans said they had spoken by phone with McConnell, the longest-serving Senate party leader in U.S. history. His comments came after a Trump ally, influencer Laura Loomer, claimed on X that the Kentucky senator was in a “vegetative state.”

Several American media have reported that emergency calls were made to 911 from McConnell’s home asking for help for an “unconscious” person who was suffering from “cardiac arrest.”

The calls also indicated that CPR was being performed on the patient. McConnell, who has served in the Senate for more than 40 years, was not explicitly named in the recording.

On Tuesday, Loomer, a far-right activist, posted that McConnell “is brain dead and hooked up to machines” and alleged a “cover-up.”

He also criticized his wife, former Transportation Secretary Elaine Chao, for visiting China during McConnell’s hospital stay.

The Chinese government has confirmed that Chao met with Chinese Vice President Han Zheng in Beijing on June 17, three days after McConnell was admitted to the hospital.

A spokesperson for Chao told the BBC on Tuesday night that McConnell’s health “did not warrant an immediate return,” although he has since returned to the United States.

“The secretary was on a long-planned trip to China to support her family’s philanthropic efforts,” the spokesperson said in a statement. “During the trip he met with several people, including the United States ambassador.”

In an apparent effort to counter Loomer’s claims, several Republican colleagues issued statements Tuesday saying they had spoken by phone with the former Senate leader.

A spokesman for Senate Leader John Thune said the two had had “a lengthy and substantive conversation that covered a range of topics, including national security.”