Trump supporters gather in Tulsa, Oklahoma on June 20. Photo: Win McNamee/Getty Images

Six of President Trump's staffers, who were part of the campaign's advance team for the president's Saturday rally in Tulsa, Oklahoma, have been quarantined after testing positive for the novel coronavirus, the campaign told Axios.

Why it matters: Trump's Saturday rally is expected to draw tens of thousands of supporters and protesters. The president has specified that face coverings at the event are optional, telling Axios' Jonathan Swan on Friday: "I recommend people do what they want."

What they're saying: “Per safety protocols, campaign staff are tested for COVID-19 before events," Tim Murtaugh, Trump campaign communications director said in a statement emailed to Axios. "Six members of the advance team tested positive out of hundreds of tests performed, and quarantine procedures were immediately implemented."

  • "No COVID-positive staffers or anyone in immediate contact will be at today’s rally or near attendees and elected officials. As previously announced, all rally attendees are given temperature checks before going through security, at which point they are given wristbands, facemasks and hand sanitizer," Murtaugh said.
  • NBC News' Carol Lee was first to report the positive coronavirus tests.

Go deeper: Oklahoma among the states with highest coronavirus case growth

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Trump campaign "strongly" encourages face masks at outdoor rally

Photo: Jabin Botsford/The Washington Post via Getty Images

The Trump campaign will be providing face masks and hand sanitizer for all attendees at an upcoming rally Saturday in Portsmouth, New Hampshire.

  • The campaign said in an email on Sunday that attendees are "strongly encouraged" to wear the masks.

Why it matters: The campaign's first coronavirus-era rally in Tulsa, Oklahoma, was notable for its lack of masks.

Kimberly Guilfoyle tests positive for coronavirus

Photo: Mandel Ngan/AFP/Getty Images

Kimberly Guilfoyle, Donald Trump Jr.'s partner and a top fundraising official for the Trump campaign, tested positive for the coronavirus on Friday, The New York Times reports.

Why it matters: Guilfoyle is the third person in President Trump’s circle known to have contracted the coronavirus. Vice President Mike Pence's press secretary tested positive, as did a personal valet who served Trump food.

Scoop: Kushner changes top Trump campaign staff

Glassner in 2017. Photo: Eduardo Munoz Alvarez/AFP via Getty Images

Michael Glassner, the man who organizes President Trump's rallies, has been "reassigned," and Trump's 2016 Arizona chair Jeff DeWit will join the campaign as chief operating officer to oversee the final stretch to election day, three sources familiar with the situation tell Axios.

Driving the news: Jared Kushner engineered these moves. Glassner, a Trump campaign original dating back to 2015, has been told he will now be handling the campaign's various lawsuits, sources say.