After three consecutive summer vacations on Martha’s Vineyard, President Obama and his family apparently will not be relaxing on the island this year as a heated presidential campaign gathers momentum toward what is expected to be a close election.

The State Police detachment on the island has been told that the president will not be coming; extensive bookings to house the president’s staff and security have been canceled by the White House travel office; and the 28-acre waterfront ­estate in Chilmark where the Obamas stayed the last three years has been sold to a British couple.