GREENSBORO — The City Council just got a lot more conservative — starting with the guy at the top. First-time mayoral candidate Bill Knight ousted incumbent Yvonne Johnson in Tuesday’s City Council election. The victory is the first by a challenger over an incumbent mayor since voters began electing the mayor at-large in 1973. Knight ran on a platform of fiscal conservatism and cleaning up the city’s police department. He will lead a council that, in the course of one election, now has a supermajority of registered Republicans. “The voters spoke to change,” Knight said. About 18 percent of the...