Manchester — Ward 3 alderman Frank Guinta has upset Manchester Mayor Robert Baines in the city’s mayoral contest, election results show. With all 12 of the city’s wards reporting, Guinta received 10,115 votes while Baines, the city’s three-term mayor, received 9,579 votes, according to unofficial results. The Republican alderman beat the Democrat mayor in a surprising victory, and Baines has conceded defeat. Voters in Laconia, for their part, enacted a city tax cap by a 1842-1708 margin. The cap will limit the Laconia city council from increasing the budget by more than the federal Consumer Price Index. Matt Lahey was...