The line for the caucus at Thomas Jefferson Elementary School in Waikiki snakes out of the cafeteria, where the voting is being conducted, out to the parking lot, and around several school buildings.
Standing near the end of the line was Noura Khoury, 24, of Waikiki, who was voting in a caucus for the first time.
"It's astounding," said "I'm stunned. I'm really impressed that people care."
Khoury is voting for Barack Obama because, she said, he is "refreshing."
"Inexperience is kind of a factor, but at the same time, it can be an asset," she said.
Sarah Arneson, 60, of Waikiki, was standing with her sister a little further down the line. A former resident of California, where she had participated in caucuses, Arneson said she was surprised at the turn-out.
"I've never seen anything like this before. Ever," she said. "I just hope they let us in."
"I think Obama is going to win, but I'm voting for Hillary," she said. "I just feel like she's the one."
The fans inside the cafeteria were not enough to cool down the hundreds of people crowded inside. Obama and Clinton campaign signs decorated the walls. Volunteers passed out name tags and ballots.
Organizers have just announced that they have run out of name tags and people will have to sign pieces of paper instead.