 President Biden, meanwhile, tested positive for COVID-19 while traveling Wednesday in Las Vegas and is experiencing mild symptoms from the infection, according to the White House. Press Secretary Karine Jean-Pierre said Biden will fly to his home in Delaware, self-isolate, and continue to carry out all of his duties fully during that time. The news had been first shared by Unidos U.S. President and CEO Janet Merguia. I was just on the phone with President Biden.