On October 21, the Maine Secretary of State released new registration data. The percentages: Democratic 32.58%; Republican 26.84%; Green 4.02%; Libertarian .54%; independent and miscellaneous 36.01%.

In February 2016 the percentages had been: Democratic 31.41%; Republican 26.69%; Green 4.07%; Libertarian .46%; independent and miscellaneous 37.38%.