Angus King grew up in Alexandria, Va., where he played on the high school football team. His father was a local lawyer, who, as King recalled, used to derisively refer to government as "gummint," but later became involved in political causes. King says his parents were "Roosevelt Democrats."
King earned a bachelor's at Dartmouth College in 1966 and a law degree from The University of Virginia in 1969.
After getting his law degree, King worked in Skowhegan, Maine, as a staff attorney for Pine Tree Legal Assistance. In 1972, he became chief counsel to the U.S. Senate Special Subcommittee on Alcoholism and Narcotics.
King then went into private law practice in Brunswick. He also spent nearly two decades as host of a Maine Public Broadcasting Network program called "Maine Watch," which reported and analyzed state public policy issues.
He became vice president and general counsel of alternative energy development company Swift River/Hasflund. In 1989, King founded and served as president of Northeast Energy Management of Brunswick, staying with the company for five years.
He was elected governor of Maine as an independent in 1994, and won re-election four years later.
Following his governorship, King and his wife took a cross-country RV tour with their younger children, and wrote a book about their experience.
Back in Maine, King became involved in renewable power again, teaming up with former MPBN President Robert Gardiner to form wind farm company Independence Wind. He divested himself in 2012 when he decided to run for Maine's open U.S. Senate seat.
King and his wife, Mary Herman, have five children.
Angus King enjoyed widespread name recognition when he entered politics as a player, not commentator, in 1994. He had been host of the public television show "Maine Watch" for nearly 20 years before he launched his 1994 gubernatorial campaign with commercials showing him rolling up his sleeves to delve into state issues.
Comfortable in public speaking situations and savvy with the media, King won election to the Maine governorship — his first elective race — as an independent with 35 percent of the vote in a five-candidate race.
He milled about with lawmakers in hallways of the Statehouse and attended public sessions to deal with state fiscal problems, unusual practices for a sitting governor.
Then the economy turned and Maine found itself with large surpluses. Rather than introduce new programs, King pushed for one-time expenditures such as rebuilding the state prison system and mental institution with the excess revenues, while pushing business equipment tax breaks. He was re-elected to a second term with 58 percent of the vote in a five-person race in 1998.
Hoping to establish his legacy, King pushed for a program to make Maine the first state to equip every middle school student with a laptop, at first eyeing huge state surpluses as a way to fund it. But gradually schools were asked to contribute to the effort as the program spread to high schools and the economy cooled.
King stayed away from politics after completing his second term, and returned to his alternative energy business pursuits. But when Republican U.S. Sen. Olympia Snowe made her surprise announcement in February 2012 that she would not seek re-election, King quickly jumped into the race. Polls show the former governor favored in the general election.
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Angus King is not up for re-election in 2014.
(Last updated by The Associated Press on June 13, 2014.)