She traveled with the President multiple times recently, including to the debate in Cleveland on Tuesday, and was seen boarding Marine One on Wednesday as Trump was heading to a campaign rally in Minnesota.
CNN has reached out to Hicks for comment.
“The President takes the health and safety of himself and everyone who works in support of him and the American people very seriously,” White House spokesman Judd Deere told CNN in a statement when asked about the level of contact between Hicks and Trump.
The White House made no mention of Hicks by name, nor did it confirm she had tested positive.
“White House Operations collaborates with the Physician to the President and the White House Military Office to ensure all plans and procedures incorporate current CDC guidance and best practices for limiting COVID-19 exposure to the greatest extent possible both on complex and when the President is traveling,” Deere added.
Some White House staffers who were in close proximity were notified of the positive test result today, one official said.
Long seen as a stabilizing force on a boss who likes chaos, Hicks joined the Trump Organization working in public relations with Ivanka Trump and moved to Trump’s 2016 presidential campaign early in the race. She was one of the few aides to follow him from his political beginnings to the White House.
Hicks maintained a close relationship not just with the President but also with members of his family, including White House advisers Ivanka Trump and her husband, Jared Kushner.
Hicks previously served as the White House communications director.
This is a breaking story and will be updated.