Alex Palou easily drove to his third IndyCar championship in four years when challenger Will Power’s seatbelt came loose minutes into the season-deciding finale Sunday at Nashville Superspeedway. “When I saw (Power) going to pit lane, at first I was like, ‘Oh, what strategy are they going to do?’” Palou said. Colton Herta, who earlier this year moved to Nashville, won the Music City Grand Prix for his first career victory on an oval and second win of the season for Andretti Global.