Kyrsten Sinema Declared Winner in Arizona Senate Race

Representative Kyrsten Sinema, a Democrat and former social worker, scored a groundbreaking victory in the race for a Senate seat in Arizona, defeating her Republican opponent after waging a campaign in which she embraced solidly centrist positions.

Ms. Sinema’s victory over Martha McSally, a Republican congresswoman and former Air Force pilot, marks the first Democratic triumph since 1976 in a battle for an open Senate seat in Arizona. Ms. Sinema takes the seat being vacated by Jeff Flake, a Republican who is leaving the Senate after repeated clashes with President Trump.

Ms. Sinema’s victory guarantees the Democrats at least 47 Senate seats. Republicans control 51, with two still undecided: Florida, where there is a recount, and Mississippi, where there is a runoff.

The Associated Press called the race and Ms. McSally conceded.

In a statement on Facebook Monday night, Ms. Sinema pointedly struck a nonpartisan note as she pledged to continue working in government to “find common ground.”

“That’s the same approach I’ll take to representing our great state in the Senate, where I’ll be an independent voice for all Arizonans,” she wrote.

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