As President Donald Trump held his first campaign rally since disclosing he contracted the coronavirus, top U.S. infectious disease expert Anthony Fauci said the United States faced a "whole lot of trouble" if it did not encourage universal wearing of face masks and avoid mass gatherings. Speaking on CNBC's "The News with Shephard Smith," Fauci said, he was concerned about the coming winter, which may increase the spread of the coronavirus with more people staying indoors. "We're in a bad place right now and we've got to turn this around," he said. Fauci also asked about tensions with the president, he said he was committed to staying in his position even if President Donald Trump is elected to another four-year term. "I'm not gonna walk away from this outbreak no matter who's the president." Fauci said he had spent his career staying out of politics and will not walk away from a virus outbreak "of historic proportions."