 A lot of people have put my grandpa through hell, and he's still standing. President Biden left the campaign trail abruptly. CBS's Weijia Jiang. The president's doctor says he had a runny nose, a cough, and he just wasn't feeling well. So even though he does not have a fever, he took a COVID test and tested positive. Mr. Biden self-isolating at his home in Delaware. CBS News Special Report. I'm Deborah Rodriguez.