White House health advisor Dr. Anthony Fauci on Sunday expressed “cautious optimism” that the deadly coronavirus outbreak is slowing down in the United States, and said that parts of the country may start to reopen as soon as May. Fauci, the director of the National Institute of Allergy and Infectious Diseases, warned on CNN’s “State of the Union” that the entire country won’t suddenly turn back on like a “light switch.” But there are “indications” that some of the metrics used to gauge the crisis “are starting to level off” in some areas, he said. Asked when parts of the...