Kimberly Guilfoyle, the girlfriend of President Trump’s eldest son and a top fundraising official for the Trump re-election campaign, tested positive for the coronavirus on Friday before a Fourth of July event at Mount Rushmore, a person familiar with her condition said.

Guilfoyle travelled to South Dakota with Trump’s son Donald Trump Jr, in anticipation of attending a huge fireworks display where the President was set to speak. They did not travel aboard Air Force One, according to the person familiar with her condition, and she was the only person in the group who tested positive.

As a routine precaution, people who come in close contact with Trump are screened for the virus. Guilfoyle is the third person in possible proximity to Trump known to have contracted the virus. A personal valet who served Trump his food and the press secretary for Vice-President Mike Pence tested positive for the virus in May.

Guilfoyle was not experiencing symptoms, the person said. She and the younger Trump never met up with the President’s entourage, the person said. The couple plan to drive back to the East Coast.

Still, that another person who was expected to be near Trump tested positive — and someone who most staff aides consider a member of the Trump family — is likely to renew attention around potential risks to the President.