US President Donald Trump and first lady Melania Trump tested positive for coronavirus, the President announced early Friday.

"Tonight, @FLOTUS and I tested positive for COVID-19. We will begin our quarantine and recovery process immediately. We will get through this TOGETHER!" Trump tweeted shortly before 1 am Friday.

https://twitter.com/realDonaldTrump/status/1311892190680014849

Trump had said earlier in the night that he planned to quarantine. "Hope Hicks, who has been working so hard without even taking a small break, has just tested positive for Covid-19. Terrible! The First Lady and I are waiting for our test results. In the meantime, we will begin our quarantine process!" Trump tweeted Thursday night.

https://twitter.com/realDonaldTrump/status/1311859538279239686

White House communications director Hicks has travelled with the President multiple times recently, including to the debate in Cleveland on Tuesday, and was seen boarding Marine One, along with several other of the President's closest aides -- Jared Kushner, Dan Scavino and Nicholas Luna -- none of whom wore masks, on Wednesday as Trump was heading to a campaign rally in Minnesota. 

"She did test positive, I just heard about this. She tested positive. She's a hard worker. Lot of masks, she wears masks a lot but she tested positive. Then I just went out with a test. I'll see -- you know, because we spent a lot of time -- and the first lady just went out with a test also. So whether we quarantine or whether we have it, I don't know," Trump said during a call-in appearance on Fox News' "Hannity."

Hope Hicks

He added, "I just went for a test and we'll see what happens, I mean, who knows. ... I spent a lot of time with Hope and so does the first lady, and she's tremendous."

While it's unclear what the President's "quarantine process" will look like, the US Centers for Disease Control and Prevention guidelines state that a 14-day quarantine should take place after the last known exposure to someone who has tested positive for Covid-19. This is because the incubation period for the novel coronavirus can be up to two weeks. 

News of Hicks' positive test comes amid continued efforts by the Trump administration to blatantly disregard science and best public health practices during the pandemic, with West Wing staff actively eschewing masks and the President defying recommendations from his own coronavirus task force, proceeding with a busy schedule of packed campaign ralies. Trump and his key aides have shown little interest in changing practices of his staff to meet the needs of the moment. 

Trump, in his Fox News interview, speculated that Hicks could have contracted the virus from an interaction with a supporter.

"She's a very warm person. She has a hard time, when soldiers and law enforcement comes up to her, you know, she wants to treat them great, not say, 'Stay away, I can't get near you.' It's a very, very tough disease," he said.

A source close to Hicks told CNN that she is experiencing symptoms and is back in Washington. A source familiar with Hicks' symptoms describes her as being achy and feeling pretty bad. 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. 

Hope Hicks, left, is seated across President Donald Trump inside Marine One as it lands on the South Lawn at the White House, Monday, Sept. 14, 2020, in Washington. (AP Photo/Manuel Balce Ceneta)

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. She previously served as the White House communications director.

Hicks' positive test underscores the unique challenge White House staffers face as they try to keep the pandemic out of the West Wing while the President pushes to reopen the country.

In May, two White House staffers, including a member of the Navy who serves as one of Trump's personal valets, tested positive for the virus, and in July a cafeteria employee on the White House grounds tested positive as well. The President confirmed a fourth positive case on White House grounds last month. 

Trump has previously expressed concern that aides contracting coronavirus would undercut his message that the outbreak is waning and states should accelerate reopening, according to a person who had spoken with him.

The White House has since gone to great lengths to shield Trump and Vice President Mike Pence from the outbreak, even as they travel to states where cases are surging.

White House press secretary Kayleigh McEnany previously described Trump as the "most tested man in America," who doesn't risk spreading the virus to others. But Trump contradicted that claim hours later, saying he doesn't know of a time he's taken more than one coronavirus test in a day.

"I don't know about more than one," Trump responded to a reporter who asked why he was tested more than once a day. "I do probably on average a test every two days, three days, and I don't know of any time I've taken two in one day, but I could see that happening."