Hillary Clinton Hillary Diane Rodham ClintonREAD: Cohen testimony alleges Trump knew Stone talked with WikiLeaks about DNC emails County GOP in Minnesota shares image comparing Sanders to Hitler Holder: 'Time to make the Electoral College a vestige of the past' MORE on Monday night held her largest rally to date, with 18,000 people flocking to see the Democratic presidential nominee campaign in the battleground state of Ohio.

ADVERTISEMENT

The Secret Service estimated there were 18,000 in attendance, including the people who were at the rally and outside the security perimeter, according to BuzzFeed.

GOP presidential nominee Donald Trump Donald John TrumpREAD: Cohen testimony alleges Trump knew Stone talked with WikiLeaks about DNC emails Trump urges North Korea to denuclearize ahead of summit Venezuela's Maduro says he fears 'bad' people around Trump MORE frequently holds rallies in large arenas. He drew 30,000 to an event in Mobile, Ala., last year.

Trump often boasts of the large crowds he draws and derides Clinton for not being able to draw as many people.

The Clinton rally at Ohio State University in Columbus Monday night could give her something to point to as she seeks to win over millennial voters.