TOPEKA, Kan. (AP) — A 19-year-old Kansas House candidate who admitted to circulating revenge porn and abusing young girls online narrowly won his primary race this month with an appeal to young, liberal voters in a safe Democratic district after having run for local office just a year earlier.

Aaron Coleman's 14-vote victory shows how social media and door-to-door campaigning can rouse voters and overcome an incumbent's fundraising advantage in a district that hasn't seen a contested primary in years. It also demonstrates how a platform that includes defunding the police, providing universal h...