Arizona Sen. Kyrsten Sinema, then a Democrat and now an Independent, speaks at a news conference after the Senate passed the Respect for Marriage Act at the Capitol Building in Washington on Nov. 29, 2022. Anna Moneymaker/Getty Images
When Sen. Kyrsten Sinema (D-Ariz.) was elected to serve Arizona in the U.S. Senate in 2018, she became the state’s first Democratic senator since 1994.