Bernie Sanders supporters cheer after the candidate speaks about student loan debt at the State Theatre in Portland on Wednesday.

Democratic presidential candidate Sen. Bernie Sanders of Vermont walks on stage at the State Theatre in Portland for a rally Wednesday.

Chrystina Gastelum of South Portland and Myles Courtney of Portland celebrate as Democratic presidential candidate Sen. Bernie Sanders of Vermont speaks to a full State Theatre on Wednesday in Portland.

Matthew Knowles stands in line along Congress Street to see Democratic presidential candidate Bernie Sanders at the State Theater in Portland Wednesday. "I didn't see him the last time he came (to Portland) but I've started to like him a lot more. I started listening to him, and it sounds like he has a real passion, and real concrete details which have invigorated me as a voter, " Knowles said.

Supporters of Democratic presidential candidate Bernie Sanders hold signs as they wait for Sanders to speak inside the State Theatre in Portland on Wednesday.

Sophie Szatkowski, 16, of Portland, cheers as she listens to Democratic presidential candidate Sen. Bernie Sanders of Vermont in Portland on Wednesday.

Democratic presidential candidate Sen. Bernie Sanders of Vermont speaks at the State Theatre on Wednesday.

Supporters of Sen. Bernie Sanders hold signs as they listen to the Democratic presidential candidate speak to a packed State Theatre in Portland on Wednesday.

Daniel Marcoux stands under a light at the State Theatre wearing a Bernie Sanders T-shirt he bought online as he waits with other supporters for the beginning of Sanders' speech in Portland on Wednesday.

Sen. Bernie Sanders of Vermont told a crowd at the State Theatre in Portland on Wednesday that he wants to make tuition free at public colleges and universities and plans to do that by implementing a tax on Wall Street speculators.

Democratic presidential candidate Sen. Bernie Sanders of Vermont spoke to a crowd of about 1,600 people at the State Theatre on Wednesday in Portland.

A crowd began to gather inside the State Theatre in Portland on Wednesday before Democratic presidential candidate Sen. Bernie Sanders of Vermont arrived to speak.

Democratic presidential candidate Sen. Bernie Sanders of Vermont spoke to a full State Theatre on Wednesday and urged voters to participate in the state's upcoming caucuses.

Paige Manoogian, 13, of Steep Falls, tries to use the fence to get a better glimpse of the front of the line at a Bernie Sanders rally outside the State Theatre in Portland on Wednesday.