Only the following races will use ranked-choice voting in the Nov. 6 election, according to the Maine Secretary of State's Office: U.S. Senate and U.S. Congress.

Candidates in those races include Incumbent U.S. Sen. Angus King, I-Brunswick; Maine Sen. Eric Brakey, R-Auburn; and Zak Ringelstein, D-Yarmouth.

Also, incumbent U.S. Rep. Chellie Pingree, D-Maine 1st District, of North Haven;  Mark Holbrook, R-Brunswick; and Maine Rep. Martin Grohman, I-Biddeford.

As well, incumbent Rep. Bruce Poliquin, R-Maine 2nd District of Oakland; Maine Rep. Jared Golden, D-Lewiston; Tiffany Bond, I-Portland; and William Hoar, I-Southwest Harbor.

Ranked-choice allows voters to chose candidates in order of preference. It was used for the first time in the June primaries to select party candidates for governor, certain House districts, and the Democratic primary for Congressional District 2.

All other races on Nov. 6, including the four-way governor's race, will be decided by a plurality of votes — meaning highest number of votes wins, regardless of overall percentage.