The audience cheered as he was pinned down and his arms were tied behind his back. MINNEAPOLIS (AP) — A man sprayed an unknown substance on Democratic U.S. Rep. Ilhan Omar and was tackled to the ground Tuesday during a town hall she was hosting in Minneapolis, where tensions over federal immigration enforcement have come to a head after agents fatally shot an intensive care nurse and a mother of three this month. The audience cheered as the man, who was wearing a black jacket and holding a