Graham Platner has won the Maine Democratic primary for U.S. Senate, setting up a high-stakes race against Republican Sen.

The primary victories set up a race that could be key to Democrats' hopes of winning control of the Senate.

It’s official: Republican Sen. Susan Collins will face Democrat Graham Platner this fall, NBC News projects, in what will be ...

Graham Platner’s fiery candidacy may fit the moment, but his baggage could sink Democrats' chances of taking back the Senate.

Graham Platner faces controversies in Maine's Democratic Senate primary as Trump's endorsement power is tested in South ...

The Democrat will face GOP incumbent Susan Collins this fall in a crucial Senate contest.

Graham Platner remains the candidate expected to win the Democratic Senate primary in Maine, but voters have mixed views ...

Platner still faces questions about his ability to win in November.

Graham Platner has secured Maine's Democratic Senate nomination, setting up a high-stakes battle against longtime incumbent ...

Fox News contributor Kellyanne Conway comments on Graham Platner's controversies, saying he exhibits a 'pattern of dishonest ...

This is a breaking story and will be updated. Graham Platner secured the Democratic nomination in the race for Republican U.S ...