Democrat Heath Mello lost his race for Omaha mayor Tuesday in a setback for supporters who argued that the Democratic National Committee and abortion rights groups were wrong to attack the anti-abortion former state senator. Mello, a 37-year-old Catholic from Omaha's working-class south side, had become a flashpoint for the internal Democratic battle over whether a candidate's position on reproductive rights should disqualify him from support by the national party after its crushing losses around the country last year. Republican Jean Stothert, a 63-year-old former nurse and city council member elected in 2013, was elected to a second term. It...