Sanders, who are neither Democratic nor Republican, while former Representative Justin Amash has joined the Libertarian Party as of April 28, 2020. Although third- party candidates rarely actually win elections, they can have an effect on them. If they do well, then they are often accused of having a spoiler effect. Sometimes, they have won votes in the electoral college, as in the 1832 Presidential election. They can draw attention to issues that may be ignored by the majority parties. If such an issue finds acceptance with the voters, one or more of the major parties may adopt the issue into its own party platform. Also, a third party may be used by the voter to cast a protest vote as a form of referendum on an important issue. Third parties may also help voter turnout by bringing more people to the polls. Third-party candidates at the top of the ticket can help to draw attention to other party candidates down the ballot, helping them to win local or state office. In 2004, the U.S. electorate consisted of an estimated 43% registered Democrats and 33% registered Republicans, with independents and those belonging to other parties constituting 25%. The only three U.S. Presidents without a major party affiliation were George Washington, John Tyler, and Andrew Johnson, and only Washington served his entire tenure as an independent. Neither of the other two were ever elected president in their own right, both being vice presidents who ascended to office upon the death of the president, and both became independents because they were unpopular with their parties. John Tyler was elected on the Whig ticket in 1840 with William Henry Harrison, but was expelled by his own party. Johnson was the running mate for Abraham Lincoln, who was reelected on the National Union ticket in 1864; it was a temporary name for the Republican Party. Bill Walker of Alaska was, from 2014 to 2018, the only independent governor in the United States. He was also the first independent governor since Alaska became a state (although not the first third-party governor). In 1998, wrestler Jesse Ventura was elected governor of Minnesota on the Reform Party ticket. As of 2021, the only independent U.S. senators are Bernie Sanders of Vermont and Angus King of Maine; both senators caucus with the Democratic Party. No current members of the House of Representatives is a member of a third