Washington (AFP) – US President Joe Biden was out of isolation on Sunday, after testing negative for Covid for a second day in a row, the first time he was able to leave the White House since July 20. Biden, 79, had tested positive for Covid and returned to isolation on July 30, in a result doctors attributed to “rebound” positivity from his earlier bout of the illness. “I’m feeling good,” the smiling president told pool reporters at the White House as he boarded a helicopter which then flew him to his beach home in Delaware. He was also optimistic about a sweeping climate and health care bi…