Minutes after a piece of concrete block was thrown through a window at the Alachua County Republican headquarters early this morning, a man was arrested and told officers he was upset about the election. The incident occured about 3:15 a.m. today at 1212 N. Main Street in the Gainesville Shopping Center, said Sgt. Keith Kameg of the Gainesville Police Department. He said two people were inside the building watching election returns and saw the man walk up and throw the block. The people, Nicholas Biltz, 27, and Katherine Vitale, 19, both of Gainesville, were not injured. "They gave a very...