Progressive Democratic candidate Graham Platner has established a double-digit lead in polling for Maine's Senate primary, according to recent surveys. The candidate is running against Governor Janet Mills for the Democratic nomination.

Platner, described as a Maine farmer in some coverage, has been gaining momentum despite facing a candidate backed by Senate Majority Leader Chuck Schumer. The primary contest appears to be shaping up as another test of progressive versus establishment Democratic politics.

In discussing his campaign's position, Platner indicated he plans to maintain his current strategy, stating "We're going to continue pushing" in reference to his polling advantage. The candidate's rise has drawn attention as an example of grassroots organizing potentially overcoming institutional Democratic Party support.

The Maine Senate race is being closely watched as part of the broader midterm election landscape, where control of the Senate remains a key battleground. Primary elections will determine which candidates advance to face Republican opponents in November.

Polling data suggests the progressive wing of the Democratic Party continues to show strength in certain races, even when facing candidates with backing from national party leadership. The outcome of Maine's primary could provide insights into voter preferences heading into the general election.