Mr Kelly was the Democratic incumbent but, while several US media organizations have called the race in his favour, the official numbers have yet to be confirmed. In a statement, the 58-year-old said: “Thank you to the people of Arizona for re-electing me to the United States Senate. “From day one, this campaign has been about the many Arizonans – Democrats, Independents and Republicans – who believe in working together to address the important challenges we face. “That’s exactly what I did for the first two years of my tenure and will continue to do while I’m there. “It has been one of the great honors of my life to serve as Arizona’s senator. “I am humbled by the trust our state has placed in me to continue this work.” Mr. Kelly is a former US Navy captain and retired astronaut who completed four trips to space, including missions to deliver equipment, supplies and crew to the International Space Station. His Republican opponent for the Arizona seat was Blake Masters, a 36-year-old businessman. Image: Mr Kelly and his Republican challenger Blake Masters. Photo: AP Read more: Check results from USMidterms are a very unreliable way to predict the next president | Adam Boulton Trump’s surge in Republican support fails to take off If Mr. Kelly’s victory is officially confirmed, it would leave the Senate tied 49-49, with control hinged on races in Nevada and Georgia. Democrats need one more seat, as Democratic Vice President Kamala Harris can be a tie-breaker. In Nevada, incumbent Democrat Kathryn Cortez Masto is 800 votes behind Republican state attorney general Adam Laxalt. The outcome in Georgia could be weeks away, with incumbent Democrat Raphael Warnock facing Republican Herschel Walker in a Dec. 6 runoff. Click to subscribe to Sky News Daily wherever you get your podcasts In the race for control of the House of Representatives, Republicans are closing in on taking a majority — a move that would end four years of Democratic rule. Read more: Donald Trump may soon be yesterday’s news as America’s far-right media turns on Ron DeSandis Could Florida Gov. Ron DeSandis derail Donald Trump’s new run for the White House? Republicans had at least 211 of the 218 seats they needed Thursday, according to projections by Edison Research. Democrats had won 199, with many of the undecided races in Arizona, California and Washington state. If Republicans consolidate a victory in the House, they could veto President Joe Biden’s agenda, severely limiting any progress he hopes to make between now and the 2024 election.