President Donald Trump is “doing very well” at Walter Reed National Medical Center after being hospitalized there for coronavirus, his White House doctor said Saturday.“I feel like I could walk out of here today,” Trump told doctors, according to White House physician Dr. Sean Conley.“The president is doing very well,” Conley said. “The team and I are extremely happy with the progress the president has made.”The long-awaited briefing is the first detailed official update on Trump’s condition.First lady Melania Trump, who has also tested positive, is reportedly doing much better than her husban…