Mills was the top choice of national Democrats who have long tried to unseat Collins, who has held the seat since 1997.

Maine’s two-term Democratic Gov. Janet Mills will run for the U.S. Senate seat held by veteran Republican Sen. Susan Collins next year, according to two people familiar with Mills’ plans on Friday, s...

Mills’ top opponents – oysterman Graham Platner, brewery owner Dan Kleban and former US House staffer Jordan Wood – have never held political office but argue they understand the affordability challe...