Young Americans played a central part in the Democratic midterm sweep, according to early estimates from a Tufts University centre that tracks youth civic engagement.

Those figures suggest the second highest youth turnout at a midterm election in 30 years, behind only 2018, when about 31 percent of young voters cast ballots during Trump's first term. While voters over 45 were roughly split between the parties, people aged 18 to 29 favoured congressional Democrats by a 35 point margin across race, gender, ethnicity and education.

The swing reversed patterns seen when Trump won in 2024. Latino youth, who gave him slim majorities then, backed Democrats this year by between 10 and 15 points. Among young white men, support flipped from 63 percent for Trump two years ago to 54 percent for Democrats now. Young white women moved toward Democrats by about 15 points, and rural young voters went from an even split in 2024 to about 60 percent support for Democratic candidates. Researchers also estimate that around 15 percent of young people who voted for Trump in 2024 chose a Democratic House candidate this time.

In a group of battleground states from Florida and Georgia to Texas, Pennsylvania and Wisconsin, estimated youth turnout was about 30 percent overall. Just over half of young voters ranked the economy and jobs as their top concern, followed by healthcare, the Iran war, immigration, education and the climate.

Local results underlined the shift. In Texas, Gina Hinojosa, the Democratic governor elect, won about 77 percent of voters aged 18 to 29. Starr County, on the Mexican border, which Trump had flipped by more than 70 points in 2024, swung back by a similar margin. In Providence, voters chose David Morales, a 28 year old democratic socialist, as the city's youngest mayor and backed a measure to pull city money from companies accused of complicity in killings of Palestinians.

Elon Musk spent close to half a billion dollars promoting Republicans, including attacks on Texas Democrat James Talarico, who still won young voters by nearly 50 points. Organisers say the next fight is inside the Democratic Party itself. By Saturday an online petition urging lawmakers to reject Hakeem Jeffries as House speaker had passed a million signatures.