The former Air Force combat pilot adopted an aggressive tone, accusing Sinema of supporting treason over her 2003 remark that it was "fine" if a radio host who was asking her a question joined the Taliban. Jake Flake, R-Ariz., who is retiring. "But Arizona proved that there is a better way forward". One of her political mentors, Jon Kyl, was appointed in September to fill John McCain's seat after Arizona's senior senator died following a struggle against brain cancer.
Schumer's PAC, Impact, donated $10,000 to Sinema's campaign and the Senate Majority PAC, a super PAC run by Schumer's ally J.B. Poersch, reserved $6.1 million in Arizona to support Sinema's campaign. 42-year-old Sinema, a USA representative and former social worker, spoke to supporters on Monday night after the result was declared in her favour, saying: "It won't be easy and it won't happen overnight, but we can work together to meet the challenges our country faces".
In a call for unity and acceptance, Sinema continued: "We can work with people who are different than us".
U.S. Rep. Martha McSally goes over the rules in a television studio prior to a televised debate with Sinema in Phoenix on October 15.
McSally congratulated Sinema on her win on Twitter, writing, "I wish her success".
Quote from Dr. Leana Wen, President of Planned Parenthood Action Fund: "Congratulations to Kyrsten Sinema on her historic won". I mean, what the f** a href="https://pjmedia.com/trending/arizona-democrat-kyrsten-sinema-calls-stay-at-home-moms-leeches/" *some feminists, and even the European Union, that women who don't work outside the home are a cultural problem.
The campaign between the two congresswomen was a bitter race that took nearly a week to decide, with mail-in ballots still being counted. Because of a state law requiring ballots to be sealed and signed, and signatures to match those on voter registration forms, it routinely takes the state longer than most to tally its results.
She had made a point of not running against President Donald Trump, or even criticising his hardline immigration stance.
On Monday night, Sinema had a 1.7 percentage point lead with 1,097,321 votes to McSally's 1,059,124, according to secretary of state website. Clinton was the first Democrat in a presidential election to win Arizona since Harry Truman in 1948.
But there was a slow but deliberate shift to the center as Sinema eyed the congressional seat created after the 2010 census, managing to win in 2012 in a tossup district.
A former spokeswoman for the Green Party, Ms. Sinema, who was once a liberal and identifies herself as bisexual, has been criticised for being too centrist and voting for Mr. Trump's legislation most of the time, as per analyses of her voting records in the House by pollsters FiveThirtyEight.com.
Also finally winning Monday is Democrat Kathy Hoffman in her race for superintendent of public instruction.
Kyrsten Sinema has become the first woman to be elected to the Senate in Arizona, replacing Jeff Flake.
Sinema played for crossover voters - those Republicans who may be willing to change their behavior and go for a Democrat - as well as independent voters. The candidate said she wasn't focused on party labels or ideology.
Dartunorro covers politics for NBC News.