Democratic Maine Senate candidate Graham Platner is less than seven weeks from an expected breakthrough in his bid to represent the state in the upper chamber. 

Platner is challenging Gov. Janet Mills (D-ME) for his party’s nomination, with polls handing him a commanding lead ahead of the June 9 primary. Whoever wins the race will face off against Sen. Susan Collins (R-ME) in the general election in one of the most competitive campaigns in the country, and one Democrats view as essential to regaining their Senate majority.