Obama: 1600 Pennsylvania Ave.
The East Wing of 1600 Pennsylvania Avenue, obviously. The Obamas also still own their home in Chicago’s Hyde Park neighborhood and visit infrequently, as when they took the girls trick-or-treating in 2010. The tight security on the Chicago house has caused some inconveniences for their neighbors: The street is blocked off to non-residents and is guarded around the clock by the Secret Service.

Romney: Between Boston, New Hampshire, and La Jolla
The Romneys' family home for many, many years was a 6,400-square-foot, six-bedroom colonial in Boston's Belmont suburb, which sat on 2.4 acres of land and included a heated pool. But their sons having flown the nest long ago, Romney and his wife, Ann, sold it in early 2009 for $3.5 million. Then this past June, the Romneys were inexplicably back in Belmont, purchasing a much smaller two-bedroom townhouse in a residential development for less than $1 million. The Romneys also own a summer home on Lake Winnipesaukee in New Hampshire. It’s their third home, however, that is really making news: A 3,009-square-foot three-bedroom oceanfront house in La Jolla, near San Diego. For some inconceivably ill-timed reason, the Romneys have decided to add a second floor and new retaining walls to the $12 million house, which also has a lap pool and spa, in the process nearly quadrupling the size of the home.