With just under four months until the 2026 US midterm elections, control of the Senate is on a knife-edge, as both parties express confidence about the outcome. Republicans currently hold a 53–47 majority, and the article surveys a dozen competitive races that could decide which party runs the chamber, making it a key marker of the political balance during Donald Trump's presidency.

The article notes that Republicans, as the party in power, face traditional midterm headwinds compounded by inflation, high petrol prices, an unpopular war with Iran and Trump's low approval ratings. Democrats, however, have their own difficulties, including an unpopular party brand and primary victories by left-wing and socialist candidates that Republicans are using to portray them as extreme. National Republican Senatorial Committee chair Tim Scott says he is optimistic the GOP can expand its majority, while his Democratic counterpart, Kirsten Gillibrand, predicts a "blue wave". The first race highlighted is North Carolina, an open Republican seat where Thom Tillis is retiring, with Trump-backed Michael Whatley expected to face Democrat Roy Cooper.