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|District||Incumbent||Party||Since||Term||Predictions||Margin of Victory|
Chellie M Pingree*
(a)Source: Daily Kos, 270toWin research. The margin is the percentage difference between the top two vote-getters in 2018.
More recent results (i.e., special elections held in 2019-20 for vacancies) are not displayed. † Race was uncontested | ^Top two vote-getters were from the same party
(b)Source: Daily Kos. The margin is the percentage difference between Donald Trump and Hillary Clinton.