US President Joe Biden tested positive for COVID-19 while on a campaign trip to Las Vegas on Wednesday and is experiencing mild symptoms, the White House said. White House press secretary Karine Jean-Pierre announced the positive test for the 81-year-old Democrat after the president of UnidosUS, a Latino civil rights organization, said Biden would not be able to speak at a scheduled event due to the diagnosis. “He is vaccinated and boosted and experiencing mild symptoms, Jean-Pierre said.