Tuesday’s Arizona GOP primary settles the party’s candidate for governor. Five Republicans are in the running. Rep. Andy Biggs runs again this year. Trump-backed candidates oppose his bid. The election fight in 2020 is the dominant theme. Some Republican leaders still question the vote counts. Polls closed at 9 p.m. local time. Latino voters could tip the balance. Experts foresee a close finish. No single leader was ahead at the start of the vote.