SAN DIEGO (AP) — Republican presidential hopeful Mitt Romney wants to nearly quadruple the size of his $12 million oceanfront mansion in La Jolla (lah-HOY'-ah).The San Diego Union-Tribune reports ( ) that the former Massachusetts governor has filed an application to demolish his roughly 3,000-square-foot, single-story house and replace it with a two-story, 11,000-square-foot residence.The existing, Spanish-style house was built in 1936, has three bedrooms, 4½ bathrooms, a lap pool and spa.Romney's proposal, along with the necessary site development permits, must be approved by the city.The newspaper reports that Romney is scheduled to attend a series of fundraisers in San Diego this weekend.Romney's spokesman Ryan Williams declined to comment on the renovation plan. He also wouldn't confirm the candidate's schedule.