The likely break-through case based on a rapid test follows a known exposure in Gov. Phil Murphy's house, within days of the family returning from vacation, according to a statement.
The president met officials in Hillsborough and families in Manville and says the damage caused by Ida underscores need to improve America's infrastructure.
Two houses and a banquet hall exploded in Manville following the flooding from the remnants of Hurricane Ida where rising waters from three rivers stopped firefighters from reaching the burning structures.