Dr. Anthony Fauci, an infectious disease expert on the White House coronavirus task force, said the Republican and Democratic nominating conventions could go on as planned this August if there’s a dramatic downturn in the number of cases. “I mean, if we have a really significant diminution of new cases and hospitalizations, and we’re at a level where it’s really very low, then again, according to the guidelines, you may be able to go to whatever phase you’re in, and that’s some sort of a capability of gathering,” Fauci told CNN in an interview on Wednesday. But he cautioned that...