The popular two-term governor is 77. Her top challenger in the primary, oyster fisherman Graham Platner, is 41.

Maine Governor Janet Mills' run for Senate comes with an unusual promise - she will only serve one six-year term.

In many ways, Janet Mills is the ideal Democratic recruit to take on Republican Sen. Susan Collins, a fifth-term moderate ...

The Maine governor and establishment pick to challenge GOP Sen. Susan Collins said she wants to keep the Senate's 60-vote ...

Democratic Gov. Janet Mills made her much-anticipated entry into the Maine Senate race, seeking to challenge Republican Sen.

The decision sets up one of the biggest primaries of the year as Democrats seek to finally oust GOP Sen. Susan Collins.

Maine's Senate race will be one of the most closely watched races in next year's midterms. Mills will first square off with ...

Hours after launching her campaign in next year’s Maine Senate race, Gov. Janet Mills (D-ME) was endorsed by former ...

However, the oldest senator to caucus with the Democrats has endorsed Platner. Bernie Sanders, I-Vt., publicly discouraged ...

The seat, held by Republican Sen. Susan Collins, could be one of only a few realistic Senate pickup opportunities for Democrats next year — but Janet Mills will need to contend with a primary battle ...

So Democrat Janet Mills, governor of Maine, is running against Susan Collins, the state’s Republican senator since 1997. An ...

Former "Meet the Press" moderator Chuck Todd says 'there's a real anti-incumbent and anti-establishment vibe inside the ...