A supporter of Donald Trump posted a video of the candidate greeting voters outside Waukesha Fire Station #5, a polling place, shortly before noon Tuesday.

Wisconsin law prohibits election activities such as holding campaign signs or distributing leaflets within 100 feet of a polling place, according to Michael Haas, elections administrator for the Wisconsin Government Accountability Board.

Hass confirmed that he had been told by the clerk for the City of Waukesha that Trump had entered a polling place. GAB officials were looking into the matter and contacting the Trump campaign to make it aware of the state rule, he said. A spokeswoman for the campaign did not answer her cellphone and did not immediately return a telephone call.