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Poll: Platner Holds Slight Lead over Incumbent Collins in Maine U.S. Senate Race

Conducted from May 13 to May 26, 2026, UMass Lowell/YouGov surveyed 650 likely Maine voters in the upcoming general election for Maine's U.S. Senate seat between incumbent Susan Collins and Democratic upstart Graham Platner.

Key Findings:

  • Democrat Grant Platner has the support of 48% of respondents, compared to 43% for incumbent U.S. Sen. Susan Collins, with 6% undecided and 2% supporting another candidate. 
  • 54% of women and 42% of men support Platner, while Collins earns the support of 35% of women and 51% of men.
  • 72% of respondents oppose the construction of an artificial intelligence data center in their community.
  • 51% of respondents said they feel a lot or a great deal of frustration over the Trump administration’s foreign policy.