Democrats took a step toward retaining control of the Senate after Mark Kelly held on to his seat in Arizona, defeating Blake Masters, a venture capitalist backed by former President Donald J. Trump, according to The Associated Press.
Mr. Kelly’s victory puts Democrats within one seat of retaining control of the Senate, which will now be decided by one of two states: Nevada or Georgia.
In Nevada, ballots were being tallied and can still be counted if they arrive as late as Saturday, as long as they have a postmark by Election Day. Adam Laxalt, the Trump-endorsed Republican in the state’s Senate race, had a small lead over the Democratic incumbent, Senator Catherine Cortez Masto, as of Friday evening, but the remaining ballots could swing the race either way.
A Democratic victory in Nevada would mean that the party would clinch control of the Senate regardless of the outcome in Georgia, where neither Senate candidate cleared 50 percent of the vote, prompting a Dec. 6 runoff.
A bright spot for Republicans — the ousting of Nevada’s Democratic governor on Friday — was countered as three of the state’s incumbent House Democrats hung on to their seats.
On the House side, the picture looks better for Republicans; Democrats have only the narrowest of paths to maintain control. Still, while a Republican majority is the most likely outcome, that majority would almost certainly be small, increasing the likelihood that intraparty disagreements would suck up Republicans’ time and energy.
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Representative Pat Ryan of New York, a Democrat, has won his race in the 18th Congressional District, according to The Associated Press. His Republican opponent, Colin Schmitt, conceded on Wednesday morning. The district was one of several battlegrounds in New York’s Hudson Valley region where Democrats were hoping to defend their seats. Mr. Ryan, who won a special election in August in a different district, was the only one whose bid met with success.
Election officials’ worst fears about right-wing voter intimidation and disruption appear not to have come to pass. Despite calls for protest by former President Donald J. Trump and right-wing influencers, Republican candidates have so far mostly accepted the results when they have lost. And while there were some disruptions at the polls, the violence and vigilantism that officials worried about did not materialize at a large scale.
The defeat of many Republicans who championed election denial and far-right politics suggests the limits of the Trumpist grass-roots movement. That loose coalition of groups and candidates resembled the Tea Party, which also sought to purge the Republican Party of what it saw as establishment elites. But unlike the Tea Party, which gave Republicans sweeping victories in the 2010 midterms and brought the Obama policy agenda nearly to a halt, the post-Trump movement has been mostly a campaign liability.
Nate Cohn contributed reporting.