LA JOLLA — GOP presidential contender Mitt Romney, scheduled to attend a series of fundraisers this weekend in San Diego, is also working on plans to nearly quadruple the size of his $12 million oceanfront manse in La Jolla. Romney has filed an application with the city to bulldoze his 3,009-square-foot, single-story home at 311 Dunemere Dr. and replace it with a two-story, 11,062-square-foot structure. No date has been set to consider the proposed coastal development and site development permits, which must be approved by the city. The former governor of Massachusetts purchased the home three years ago. According to...