Since the last gubernatorial election, Maine has added nearly 60,000 new registered voters on the internet. This is a voting group sizable enough to influence this fall’s contest between Gov. Janet Mills and former Gov. Paul LePage.During that time, Democrats gained almost twice as many new voters as Republicans. However, information from the Maine secretary of state’s office reveals a growing geographic polarization of Maine voters. In advance of the governor’s contest in November, it paints the landscape in the clearest light yet. The steep fall in voters not affiliated with a major party since just four years ago is notable. In Maine, only 32% of registered voters are not currently enrolled, down from about 37% ten years ago. In a state where two independent governors have been elected, that segment of voters has had a significant role in shaping the political identity for decades.Given…