NEWTON, Iowa (AP) — Ryan Hunter-Reay passed Scott Dixon with 12 laps to go and held on to win for the second straight week in a wild IndyCar Series race that ended under caution Saturday night. Hunter-Reay, the winner last week at the Milwaukee Mile, moved to second in the season standings with his seventh career IndyCar victory — the most among active U.S. drivers. The victory was Andrettti Autosport’s fourth in six races in Iowa. Teammate Marco Andretti was second, followed by Tony Kanaan and Dixon. The It was only fitting Hunter-Reay would win under caution, because 10 of the 25 cars failed to finish. Pole sitter Dario Franchitti was knocked out after his engine blew before the green flag dropped — a blow that could cripple his shot at a fourth straight series title. Points leader Will Power was bounced just 68 laps in after E.J. Viso hit him from behind. Power’s lead dwindled to three points.