WASHINGTON — Delta Air Lines is punishing Congress for failing to fund the Department of Homeland Security. The airline company has temporarily yanked its special congressional desk service to lawmakers and staffers on Capitol Hill until Congress finally funds the DHS, which has been in a partial shutdown since Feb. 28. “Due to the impact on resources from the longstanding government shutdown, Delta will temporarily suspend specialty services to members of Congress flying Delta,” the company said in a statement first reported by the Atlanta Journal-Constitution.