Presidential hopeful and Vermont Sen. Bernie Sanders attended a rally in Hartford on Monday as a new poll shows him and Democratic opponent Hillary Clinton are virtually neck-and-neck in the state.

Hundreds of supporters attended the rally at the Riverfront Amphitheater this morning, one day ahead of Connecticut's primary election. Sanders told the cheering crowd that now is time for a political revolution, and he said America needs to strengthen its Democracy by getting special interest out of politics.

The Sanders campaign believes turnout in Connecticut's primary is key to getting ahead. "My request to you is, let's make history. Let's have Connecticut have the highest voter turnout in the history of Democratic primaries," Sanders told the crowd.

Clinton has been stumping in the state as well. She met with voters in New Haven on Saturday and spoke at the University of Bridgeport on Sunday.

The results of a Public Policy Polling survey released today say the Democratic primary race in Connecticut is a virtual toss-up, although another poll by Quinnipiac University last week put Clinton head by nine points.

The polls for Connecticut's primary will open Tuesday at 6 a.m. Primary elections are also being held in Delaware, Rhode Island, Pennsylvania and Maryland.