Vice President Kamala Harris has a 44-point lead among registered voters under 30 in seven battleground states, according to a poll released Tuesday by a liberal advocacy organization.

Voters of Tomorrow polled 1,601 voters under 30 in Arizona, Georgia, Pennsylvania, Michigan, North Carolina, Nevada and Wisconsin from Aug. 16-20.

The poll found that 66% of registered young voters support Ms. Harris’ candidacy compared with 22% who back former President Donald Trump. Among young people in general, Ms. Harris still has a commanding lead, 54%-22%.

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The poll also revealed that Ms. Harris has an opportunity to expand her lead by winning over undecided voters. When asked which candidate they preferred, undecided voters under 30 said they favored Ms. Harris (24%) over Mr. Trump (10%).

Youth voters in swing states also hold favorable opinions of Ms. Harris and her running mate, Minnesota Gov. Tim Walz, and unfavorable opinions of Mr. Trump and his running mate, Sen. J.D. Vance, Ohio Republican.

Ms. Harris has a 21-point net favorability rating among young voters, with 53% liking her and 32% down on her. Mr. Trump has a negative 31-point favorability rating, with 29% liking him and 60% not into him.

Mr. Walz, meanwhile, has a 23% net favorability rating, with voters against Mr. Vance by 35%.

Regarding which candidate is more trustworthy among voters concerning the economy, Ms. Harris has a narrow lead over Mr. Trump, 38%-33%. It’s also close on which candidate voters trust to address the cost of living, with Ms. Harris leading 39%-31%.

But young voters overwhelmingly favor Ms. Harris on abortion (58%-17%), education (51%-18%), health care (52%-17%) and gun policy (48%-24%).

“Young people in battleground states want a president who can tackle the issues facing us in our everyday lives. They believe that leader is Kamala Harris,” said Santiago Mayer, executive director of Voters of Tomorrow.