WASHINGTON (AP) — Is Bo a rescued dog or not? Did President Obama keep or break a campaign promise in picking the purebred as the family's new pet? The twists and turns of the Portuguese water dog's route to the White House make for the kind of intrigue that political junkies and the highly opinionated dog world delight in. Barack Obama and his wife Michelle said during the presidential campaign that they had promised their two girls a dog after the election. The Obamas repeatedly said they wanted it to be a rescued dog such as one from a shelter....