A tense situation unfolded at the site of a Trump rally on Long Island, New York, when reports of a potential bomb caused a brief scare. The drama started when a journalist claimed that a police dog had sniffed out an explosive device in a car parked inside the rally's security zone.

According to the journalist, the driver of the car ran away into the woods after the dog made the discovery. The story quickly spread, raising fears that the rally might be in danger.

However, Nassau Coun...