Because older people vote at higher rates than younger, baby boomers will almost certainly cast more actual ballots this year than Millennials. Even so, Project New America, a Democratic research group, recently calculated that 53 million Millennials are now registered to vote, up over 20 million just since 2012. The number of registered Millennials has increased since 2012 by at least 40 percent in Virginia, Ohio, Colorado, Nevada, and North Carolina, all key battlegrounds.

Diverse, heavily secular, and inclusive, Millennials are a tough audience for Trump. In a June survey by the non-partisan Public Religion Research Institute and the center-left Brookings Institution, Millennials were less likely than any older age group to support Trump’s proposals to temporarily bar Muslim immigration or build a wall along the Mexican border, and most likely to say immigrants benefit, rather than burden, U.S. society.

Another early July survey solely of Millennials in 11 battleground states conducted by the Democratic pollster Andrew Baumann for Project New America and NextGen Climate, a liberal group that supports action on climate change, provided the fullest picture of Trump’s difficulties—and Clinton’s challenge—with this generation. (The poll was conducted online, a technique that has not yet demonstrated as much overall reliability as phone surveys, but which has advantages for reaching young people.)

In that survey, three-fourths of battleground-state Millennials described Trump as a racist; an equal number said he does not respect women. Nearly seven-in-ten said they “would be ashamed of my country” if Trump wins. (Trump’s extended post-convention confrontation with the Muslim-American Khan family is unlikely to improve those numbers.)“These voters disdain Trump as much or more as anyone else in the electorate,” Baumann said.

Those harsh verdicts span familiar divides. While older blue-collar white voters provide the foundation of Trump’s support, Baumann’s poll found that about seven-in-ten non-college white Millennials viewed Trump as a racist and disrespectful to women, little different than their college-educated counterparts.

And yet even though roughly three-fourths of all battleground-state Millennials expressed these disparaging views of Trump, the survey found Clinton drawing just 43 percent against him in a four-way race that included libertarian Gary Johnson and Green Party candidate Jill Stein. While Trump attracted only 24 percent, nearly as many picked Johnson or Stein, and the rest said they were either undecided or wouldn’t vote. By comparison, Obama carried two-thirds of Millennials in 2008 and three-fifths in 2012.

The core of Clinton’s problem: About one-fifth of Millennials surveyed said they would vote for Sanders against Trump, but not for her. Two-thirds of those Sanders hold-outs said they see “no real difference” between Clinton and Trump on the issues they care most about. Sanders “was trying to paint her as a tool of the oligarchs and neo-conservatives,” said Baumann. “And he had some success.”