Trump, who trails in the polls ahead of the November 3 election, was especially under pressure about the coronavirus that has killed over 217,000 Americans and inflicted deep economic damage.
Trump balked at holding the debate in that format, and Biden scheduled a town hall with ABC News for that night once Trump said he would not participate.
Other positive cases close to Trump now include his wife Melania, his close aide Hope Hicks, his campaign manager Bill Stepien, two of McEnany's assistants.
