{"text":[[{"start":6,"text":"The writer is an FT contributing editor and chief economist at American Compass"}],[{"start":10.92,"text":"If a Democratic “blue wave” breaks across America in next week’s midterm elections, its effects are guaranteed to be felt for years. A peculiar feature of the American constitutional system means that dramatic electoral upsets are locked in place."}],[{"start":25.36,"text":"Seats in the House of Representatives are contested every two years, the presidency every four. But a senator holds office for at least six: those elected this year will remain throughout the first term of President Donald Trump’s successor."}],[{"start":38.6,"text":"Six-year terms for senators leave only one-third of the Senate up for grabs during each biennial congressional election, creating patterns of contested seats that can favour one side or the other. But analysts don’t focus on whether most races are in states that lean Democratic (“blue”) or Republican (“red”). Yes, in a year when most seats lean blue, Democrats are likely to score more wins. But that may not mean much. If the incumbents in those seats were Democrats already, winning them all will do no better than preserve the status quo ante."}],[{"start":67.36,"text":"To determine which side the map favours, analysts look instead at who has the most vulnerable seats. A year that features many blue seats in red states, but few red seats in blue states, presents a favourable map for Republicans. Other things being equal, they can expect to flip some blue seats red, while Democrats will have fewer red seats to target for flipping blue."}],[{"start":87.38,"text":"This year’s map was supposed to favour Republicans. They hold 22 of the 35 seats being contested, all but one in states that Trump won by at least three points in 2024. The Democrats are only defending 13 seats, but those include two in states that Trump won. Starting from a 53-47 margin, as well as the vice-president’s tiebreaking vote, Republicans can lose three seats and retain their majority. Democrats have to defend all of their seats, including those in states that went narrowly for Trump, win the seats that Republicans have held in Maine and North Carolina, and then flip two additional seats in states that Trump won by more than 10 points."}],[{"start":125.44,"text":"Democrats now stand on the brink of accomplishing a feat that in early 2025 would have been considered laughably unlikely. With a flip of North Carolina likely, and Michigan their only seat that looks to be in serious danger, they need to win just four of the nine most competitive races to end the night with 51 seats. Republicans would have to win six to stop them."}],[{"start":147.48,"text":"But the nature of the seats where the result is a toss-up portends a longer-term shift. The Michigan seat, held by Democrats in a state that went narrowly for Trump, is the type that often sits on a knife’s edge. Likewise the Maine seat, held by a Republican in a state that went for Kamala Harris. But the seven other races much too close to call are for seats held by Republicans in squarely red states, including Texas, which has not elected a Democratic senator since the 1980s, and Kansas, which last elected one before the second world war."}],[{"start":180.08,"text":"The American public has become accustomed to a Senate split roughly 50-50. But that balance is not generated by 100 flips of a coin. The seats in most states are securely and almost permanently held by one party or another. Variation in a much smaller number of swing seats determines the margin from one Congress to the next. Flip a few of the secure states, though, and the whole apparatus tilts off kilter."}],[{"start":203.28,"text":"The effect is easy enough to model, starting from a baseline that apportions senators based on how often each party has held each seat at the start of a new Congress. A state like Kansas or Texas is worth two Republicans, having delivered that outcome every time for decades. A state like California or Connecticut likewise earns hard-coded Democratic status. In the middle, a state like Florida or New Hampshire has regularly provided representatives from either party, so the ones it has most recently elected will tend to determine the majority. Adding up the expected number of Republican senators from each state, based on all elections this millennium, yields a total of almost precisely 50. Securing a seat they always hold does not move the balance at all."}],[{"start":246.12,"text":"Losing that election, though, is a disaster. If a Senate has been held in almost perfect 50-50 repose with Texas sending only Republicans, and suddenly it sends a Democrat, the chamber’s expected balance shifts to 51-49 in the latter’s favour. Not for the next two years — for the next six. Send one from Kansas as well, and Democrats can expect business as usual in every other election that year, two years later, and four years later, to leave them with a four-seat edge. The loss already expected in North Carolina (80 per cent GOP) is nearly as costly as would be ones in Alaska or South Carolina (90 per cent GOP)."}],[{"start":284.92,"text":"Conventional wisdom holds that an unpopular president who loses the midterms has handicapped himself for the rest of his term. That is surely true. But if Trump delivers this particular loss, it will hang around his party’s neck long after he has departed the scene."}],[{"start":299.6,"text":"The good news is that when 2032 comes around, analysts will be gushing about how favourable the map looks for the Republicans, with obvious pick-ups available in traditionally Republican seats. But six years is a long time."}],[{"start":312.8,"text":"Join Oren Cass and FT journalists for an exclusive subscriber webinar on Tuesday November 10 from 1pm-2pm GMT to answer your questions on what the midterm results mean for America and the world. Register now at ft.com/midterms2026"}],[{"start":333.48,"text":""}]],"url":"https://audio.ftcn.net.cn/album/a_1793417085_1482.mp3"}