Former astronaut Mark Kelly defeated his Republican opponent in the Senate race in Arizona with only two seats left to decide.
Kelly, 58, a current senator, said in a statement: “Thank you to the people of Arizona for re-electing me to the United States Senate.
“From day one, this movement has been relevant to many Arizonans — Democrats, independents and Republicans — who believe in working together to address the big challenges we face.
“That’s exactly what I did in my first two years in office, and I will continue to do it as long as I’m there.
“Serving as Senator from Arizona has been one of the greatest privileges of my life.
“I’m humbled by the trust our state has placed in me to continue this work.”
Mr. Kelly, a former U.S. Navy captain and retired astronaut, has made four trips into space, including delivering equipment, supplies and crew to the International Space Station.
His Republican rival for the Arizona seat is 36-year-old venture capitalist Blake Masters.
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If Mr. Kelly’s victory ties the Senate at 49-49, the Nevada-Georgian race will be in control.
Democrats need one more seat if Democratic Vice President Kamala Harris can cast a tie-breaking vote.
In Nevada, incumbent Democrat Kathryn Cortez Masto is within 800 votes of Republican state Attorney General Adam Laxalter.
The Georgia result could be weeks away, with Democratic incumbent Rafael Warnock facing Republican Herschel Walker in the Dec. 6 runoff.
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Republicans had at least 211 of the 218 seats they needed on Thursday, according to forecasts by Edison Research.
Democrats have won 199 races in Arizona, California and Washington, many of which remain undecided.
If Republicans do consolidate a House victory, they will be able to veto President Joe Biden’s agenda, severely limiting any progress he might hope to make between now and the 2024 election.