Maine became the first U.S. state to approve IRV for its primary and general elections for governor, U.S. Senate, U.S. House and state legislature in a 2016 referendum. The state supreme court ruled this method of voting was unconstitutional for state general elections, but this ruling did not affect primary and federal elections. The state legislature attempted to repeal IRV for all elections unless the state constitution was amended, but this repeal was put on hold by a people's veto petition. The June 2018 primary election both used IRV to determine party candidates and Maine Question 1 passed, which blocked the repeal. Democrat Jared Golden became the first congressional candidate in the United States to win a general election as a result of IRV, defeating incumbent Republican Bruce Poliquin in second round balloting for Maine's 2nd congressional district in 2018. In the future, IRV will also be used for primary elections for federal elections and only primary elections for state offices. A bill passed in August 2019 will make Maine the first state to use IRV in presidential general elections in 2020, but use in presidential primaries has been delayed until 2024.