After two years of protracted negotiations with U.S. regulators, Walgreens and Rite Aid have called off their plans for a merger. Instead, Walgreens has agreed to buy 2,350 Rite Aid stores in the Northeast, the Southeast and the Mid-Atlantic. The company hasn’t disclosed which stores are part of this new deal, but a spokesman tells us that all will eventually be absorbed into the Walgreens brand. That likely means one less drug store for Potomac Village, where Walgreens and Rite Aid are neighbors on opposite sides of River Road.