5:00 PM PT -- The President's experienced shortness of breath and a mild fever on Friday ... according to sources with direct knowledge. We're also told he insisted on wearing a suit for that video he tweeted and for his brief trip to Walter Reed.
One source who's had interactions with him in the last week told TMZ ... President Trump had not been feeling well for a couple of days prior to Thursday. That's important because it would increase the possibility others around POTUS were exposed to the virus.
3:36 PM PT -- Trump posted a video thanking everyone for their support and saying, "I think I'm doing very well, but we are going to make sure that things work out."
3:22 PM PT -- Trump just boarded Marine One, wearing a mask, and is currently in the air on his way to Walter Reed.
President Trump will be flown to Walter Reed Military Hospital for continued treatment for COVID-19.
The White House just announced the President will be flown to the renowned Bethesda, MD facility on Friday afternoon. It's a dramatic turn, considering the administration previously said he was "fatigued" and experiencing "mild symptoms."
The Marine One helicopter has already landed on the South Lawn at the White House ... ready to transport Trump.
The White House Press Secretary Kayleigh McEnany says, "Out of an abundance of caution, and at the recommendation of his physician and medical experts, the President will be working from the presidential offices at Walter Reed for the next few days.”
Sources connected to the White House tell us the move is primarily because they want an added level of safety for the President, considering he's high risk due to his age and weight.
We're told his illness was obvious Friday during conference calls, and he was unusually quiet. There were early signs Thursday night when he called in to Sean Hannity's show on Fox News around 9:30 PM Eastern time -- he sounded like he had low energy and a case of the sniffles.
We're told, at that point, Trump already suspected he had COVID-19 ... although, he didn't announce his test results on Twitter until almost 1 AM Eastern time.