Ronna McDaniel, the chairwoman of the Republican National Committee, has tested positive for the coronavirus and is experiencing mild symptoms.
McDaniel is the latest person who is in frequent contact with President Trump to test positive for the virus.
She was last with Trump last Friday, and has been at her home in Michigan since then, the people briefed on the matter said.
She received her diagnosis on Wednesday, they said.
After a crowded donor event in March at Mar-a-Lago, the president’s private club in Florida, McDaniel fell ill, but she tested negative at the time.
As a top official, McDaniel frequently interacts with the President and other top Republican lawmakers.
McDaniel has defended the President against accusations that he downplayed and mishandled the coronavirus pandemic.
She’s also been supportive of the Trump campaign’s decision to hold indoor rallies, despite the clear risk to attendees’ health and the potential violation of local coronavirus restrictions on crowd size.
Trump’s diagnosis throws into question the status of the next presidential debates and how Republicans intend to rally supporters in the final stretch of the campaign as their party’s nominee is kept off the campaign trail and isolating at the White House.