1. Expenditures to influence voting

Whoever makes or offers to make an expenditure to any person, either to vote or withhold his vote, or to vote for or against any candidate; and

Whoever solicits, accepts, or receives any such expenditure in consideration of his vote or the withholding of his vote-

Shall be fined under this title or imprisoned not more than one year, or both; and if the violation was willful, shall be fined under this title or imprisoned not more than two years, or both.

State Revised Codes of Washington:

RCW  29A.84.620

Hindering or bribing voter.

Any person who uses menace, force, threat, or any unlawful means towards any voter to hinder or deter such a voter from voting, or directly or indirectly offers any bribe, reward, or any thing of value to a voter in exchange for the voter’s vote for or against any person or ballot measure, or authorizes any person to do so, is guilty of a class C felony punishable under RCW  9A.20.021.

RCW  29A.84.640

Solicitation of bribe by voter.

Any person who solicits, requests, or demands, directly or indirectly, any reward or thing of value or the promise thereof in exchange for his or her vote or in exchange for the vote of any other person for or against any candidate or for or against any ballot measure to be voted upon at a primary or special or general election is guilty of a gross misdemeanor punishable to the same extent as a gross misdemeanor that is punishable under RCW  9A.20.021.