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Rep. Kyrsten Sinema, D-Ariz. Photo: Bill Clark/CQ Roll Call

Democratic Rep. Kyrsten Sinema has picked up an insurmountable lead over Republican opponent Rep. Martha McSally, handing Democrats a seat Republicans have held since 1994, the AP projects.

Why it matters: Sinema will replace retiring Republican Sen. Jeff Flake and is set to becoming the first woman to represent Arizona in the Senate. Even though Republicans will maintain control of the Senate next year, Sinema’s victory has chipped away the durable majority they were hoping to cement. The bitterly fought contest comes to an end after President Trump and some national and state Republicans cast doubt on the elections legitimacy as Sinema’s lead was expanding each day as new ballots were being counted. 

In a video following the AP's projection, McSally conceded and said she has called Sinema to congratulate her.

Go deeper

Updated 22 mins ago - Politics & Policy

Inauguration Day dashboard

U.S. Capitol and stage are lit at sunrise ahead of the inauguration of Joe Biden. Photo: Patrick Semansky - Pool/Getty Images

President Biden has delivered his inaugural address at the Capitol, calling for an end to the politics as total war but warning that "we have far to go" to heal the country.

What's next: Biden has arrived at the White House and he will sign executive orders and other presidential actions.

50 mins ago - Podcasts

Podcast: After the Biden inaugural

Joe Biden was sworn in today as America's 46th president in an inauguration unlike any other in modern history.

Axios Re:Cap goes deeper into the speech, the atmosphere and what it all tells us about the incoming administration, with Axios political reporters Hans Nichols and Alexi McCammond.

Biden embarks on a consequential presidency

Photo illustration: Sarah Grillo/Axios. Photo: Joe Raedle/Getty Images

Donald Trump tried everything to delegitimize the rival who vanquished him. In reality, he's set Joe Biden on course to be a far more consequential U.S. president than he might otherwise have become.

The big picture: President Biden now confronts not just a pandemic, but massive political divisions and an assault on truth — and the aftermath of the assault on the Capitol two weeks ago that threatened democracy itself.