The forces of American culture and politics are pushing men and women under age 30 into opposing camps, creating a new fault line in the electorate and adding an unexpected wild card into the 2024 presidential election. 

Voters under 30 have been a pillar of the Democratic coalition since Ronald Reagan left office in 1989. That pillar is showing cracks, with young men defecting from the party. 

Young men now favor Republican control of Congress and Trump for president after backing President Biden and Democratic lawmakers in 2020.

Women under 30 remain strongly behind Democrats for Congress and the White House. They are also far more likely to call themselves liberal than two decades ago.