According to the National Archives and the U.S. House of Representatives History, Art and Archives website, two states, Maine and Nebraska, employ a district-based system for determining how their electors vote. In this system, two electors vote for the candidate that carries the stateâ€™s popular vote and one votes for the candidate that carries each districtâ€™s popular vote. Since Nebraska and Maine have five and four electors respectively, this has led to some interesting electoral vote combinations in recent elections. According to FairVote.com, "the statewide winners have swept all of the state's districts in every election except 2008 and 2016. In 2008, Nebraska gave four of its electoral votes to John McCain, but Barack Obama won a single electoral vote from Nebraska's 2nd Congressional District. In 2016, Maine gave three of its electoral votes to Hillary Clinton, but Donald Trump won a single electoral vote in Maine's 2nd Congressional District."