Rep. Kyrsten Sinema (D), who was declared the winner on Monday in Arizona’s Senate race, called for bipartisanship and ending partisan gridlock in her victory speech, invoking the late Sen. John McCain John Sidney McCainThe Memo: Trump's strengths complicate election picture Mark Kelly: Arizona Senate race winner should be sworn in 'promptly' Cindy McCain: Trump allegedly calling war dead 'losers' was 'pretty much' last straw before Biden endorsement MORE (R-Ariz.) as an example of how to achieve that.

Sinema defeated Rep. Martha McSally Martha Elizabeth McSallyThe Hill's Campaign Report: Presidential polls tighten weeks out from Election Day Mark Kelly: Arizona Senate race winner should be sworn in 'promptly' New ABC/WaPost poll finds Trump edging Biden in Arizona, Florida MORE (R-Ariz.) in one of the most closely watched Senate races this cycle. Sinema led by a margin of 38,197 votes, or about 1.7 percentage points, when The Associated Press called the race six full days after Election Day.

In a Monday night speech, the Democratic congresswoman dedicated a large part of her speech to honoring McCain, who died in late August after being diagnosed with brain cancer.

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Sinema said the question she heard the most from voters was why the country has become so polarized.

“Arizona rejected what has become far too common in our country: name-calling, petty, personal attacks and doing and saying whatever it takes just to get elected,” Sinema told supporters in a Monday victory speech. “We can embrace differences while seeking common ground.”

"[McCain’s] example shines a light on our way forward. Sen. John McCain stood for everything we stand for as Arizonans: fighting for what you believe in, standing up for what’s right even if you stand alone, and serving a cause that’s greater than oneself."

“It won’t be easy and it won’t happen overnight," she concluded. "We can do this differently. For our country, for our future, for Sen. McCain, and for each other, I think we must.”

“Arizona proved that there is a better way forward...We can be friends with people who are different than us. We can love and care about people who are different than us,” says presumptive AZ Senator-elect Kyrsten Sinema. https://t.co/rUrJKW05Ll pic.twitter.com/lgEtKpiMJC — CBS News (@CBSNews) November 12, 2018

Sinema becomes Arizona’s first female senator as well as the first Democratic senator elected to the state since 1988.

Apart from Arizona, Nevada is the only other Senate seat that Democrats picked up this cycle. Rep. Jacky Rosen Jacklyn (Jacky) Sheryl RosenHillicon Valley: Election officials prepare for new Russian interference battle | 'Markeyverse' of online fans helps take down a Kennedy | GOP senators unveil bill to update tech liability protections Google, Apple, eBay to meet virtually with lawmakers for tech group's annual fly-in Senate Democrats demand answers on migrant child trafficking during pandemic MORE (D-Nev.) unseated Sen. Dean Heller Dean Arthur HellerOn The Trail: Democrats plan to hammer Trump on Social Security, Medicare Lobbying World Democrats spend big to put Senate in play MORE, who was the only GOP senator up for reelection in state Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE carried in 2016.

Republicans have already secured the Senate majority with wins in North Dakota, Missouri and Indiana. But the size of that majority remains up in the air as Florida undergoes a recount and Mississippi holds a special election runoff on Nov. 27.