As an openly bisexual woman, Sinema has made history several times through her electoral success. In 2012, she became the first openly bisexual person and the second openly LGBT woman (after Tammy Baldwin of Wisconsin) elected to Congress. In 2018, she became the first openly bisexual person and the second openly LGBT person (after Baldwin) elected to the United States Senate as well as the first woman elected to the Senate from Arizona.
She has been open about her bisexuality throughout her political career.
Although Sinema says she's "always been out," her first public comment as an elected official came in 2005, after a Republican colleague's speech insulted LGBT people. "We're simply people like everyone else who want and deserve respect," she passionately declared. Later, when reporters asked about her use of the first person, Sinema replied, "Duh, I'm bisexual."