Breeders’ Cup: Gun Runner goes wire to wire to take Classic

DEL MAR — There’s no debate. The case is closed. Gun Runner is the best older horse in America.The 4-year-old son of Candy Ride capped an exceptional 2017 campaign Saturday with an exclamation mark, rolling to a 2-1/4-length victory in the $6 million Breeders’ Cup Classic at Del Mar that most assuredly will result in the colt being named Horse of the Year in January.Gun Runner took the lead right out of the gate, set fast fractions of 22.50, 46.31 and 1:10.50 for the mile and a