Republicans in places like Springfield, Ohio, and Charleroi, Pa., say Haitian immigrants have provided a boost.

She and her sister Sarah, 15, grew up in the Chatham neighborhood to a Haitian-born mother and a first-generation Haitian American father, Patrick Brutus, who was one of the rally organizers. The girls found out Trump was talking about Haitians on the internet.

More than 30 bomb threats have been made against schools, government buildings and city officials’ homes since last week, forcing evacuations and closures.