It's hard to pick the perfect escape when you're the leader of the free world. But word has it that the Obamas have found the hideaway they need: A 28-acre, $20-million property on Martha's Vineyard Island, off the coast of Massachusetts, called Blue Heron Farm. The 10,000-square-foot retreat has everything a president wanting some downtime needs, including a swimming pool, basketball court, and golf tee. And it is even dog-friendly. The Obama family will pay its own way for a one-week getaway at the end of August, and it's not cheap: Rents reportedly run from $35-$50,000 a week for similar...