Barclays in Wilmington launches new GM Mastercard

WILMINGTON — On a rainy day, General Motors Vice President of Loyalty Programs Ralph Darmo eagerly slipped behind the wheel of a parked Indianapolis 500 pace car at the Barclay’s Riverfront office.

As he revved the engine on the Chevrolet Corvette ZR1 that’s so new it just hit dealerships weeks ago, working it steadily up to 100 mph, the…