Ms. Guilfoyle, a top fundraiser for the Trump campaign was reportedly tested in South Dakota before she was due to attend an Independence Day event at Mount Rushmore with President Donald Trump.

The news was confirmed by Sergio Gor, the chief of staff for the Trump Victory Finance Committee. 

"After testing positive, Kimberly was immediately isolated to limit any exposure. She's doing well, and will be retested to ensure the diagnosis is correct since she's asymptomatic but as a precaution will cancel all upcoming events. Donald Trump Jr was tested negative, but as a precaution is also self isolating and is canceling all public events."

That source said Guilfoyle had not had recent contact with the President, but she was in Tulsa, Oklahoma, and was backstage for his rally there and, was also at his event in Phoenix.

The insider also added that Donald Jr tested negative for Coronavirus.

Guilfoyle is the third person close to the president to test positive for COVID-19 after one of Trump's personal valets and Vice President Mike Pence's press secretary Katie Miller tested positive back in May.