SurveyUSA interviewed 800 Maine adults 10/19/08 and 10/20/08. Of the adults, 730 were registered to vote. Of the registered voters, 642 were determined by SurveyUSA to have already voted or to be likely to vote in the 11/04/08 general election. Maine has 4 Electoral College votes. Maine's 4 electoral votes are allocated proportionally; the winner of each congressional district receives 1 electoral vote, and the statewide winner receives the other 2 votes. Maine has has this system since 1972, but it has never been used; no candidate has ever won the state of Maine without carrying both congressional districts. John Kerry carried Maine by 9 points in 2004; Al Gore carried Maine by 5 points in 2000.