Rahal Letterman Lanigan Racing KOHLER Grand Prix at Road America Verizon IndyCar Series RACE NOTES/QUOTES – June 25, 2017   RAHAL FINISHED EIGHTH IN THE KOHLER GRAND PRIX AT ROAD AMERICA GRAHAM RAHAL, No. 15 GEHL / D-A Lubricant Dallara/Honda/Firestone:  “The car was a handful today. I knew about five laps in that I didn’t…