The Presidential Coattails Effect
The single most reliable predictor of high turnout in a Maine Senate race is whether it coincides with a presidential election. On average, about 75% of Maine's voting-eligible population casts a ballot in presidential years, a number that drops to around 60% in midterm cycles. This trend holds true for Senate contests. For instance, the 2020 election, which featured a high-stakes presidential race, saw a voter turnout of nearly 75%. Contrast that with the 2014 midterm, where turnout was significantly lower. This isn't unique to Maine, but the swing is dramatic. The heightened media attention, national implications, and get-out-the-vote efforts of a presidential campaign create a powerful tide that lifts participation in all down-ballot races,
including those for the U.S. Senate.
When Star Power Drives the Vote
Beyond the presidential cycle, the candidates themselves play a huge role. Maine has a modern history of electing powerful, independent-minded senators who build strong personal brands. Races involving figures like Republican Susan Collins and Independent Angus King have consistently drawn significant attention. The 2020 contest between Collins and her Democratic challenger, Sara Gideon, became one of the most expensive in the state's history, attracting national money and media. Despite polls showing her trailing, Collins won by a comfortable margin, demonstrating the power of her established identity with voters. Similarly, Angus King, a former two-term governor, has won his Senate races as an independent, proving that Maine voters often prioritize the individual over party affiliation, a factor that can energize different segments of the electorate.
The Midterm Lull and Independent Streaks
Midterm elections almost invariably see a dip in voter participation across the country, and Maine is no exception. Senate races held in years like 1990, 2014, and 2018 saw lower turnout than those in presidential years. In 1990, incumbent Republican William Cohen won his third term with just over 520,000 total votes cast in the race. The presence of a strong independent or third-party candidate, a common feature in Maine politics, can also complicate turnout predictions. While some analysts believe three-way races can depress turnout by making a majority victory seem unattainable for any single candidate, they can also energize voters who feel unrepresented by the two major parties. The elections of Angus King, who first won his seat in 2012, are a testament to the latter.
New Rules and Future Trends
A major development in Maine's recent electoral history is the adoption of ranked-choice voting (RCV) for federal elections, first used statewide in 2018. The system, which allows voters to rank candidates in order of preference, was championed as a way to ensure winners have majority support and to foster more civil campaigning. While its direct impact on turnout is still being studied, it adds a new dynamic to Senate races. The 2020 Senate race was a potential RCV contest, but Susan Collins secured over 50% of the first-choice votes, precluding the need for an instant runoff. As Maine continues to lead with voter-friendly laws like same-day and automatic registration, its high levels of engagement are likely to persist, making it a key state to watch for national trends.
