(CNN) Update: After Former Maryland Gov. Martin O'Malley dropped out of the race Monday night, the start time of the town hall was moved to 9 p.m.

The Democratic presidential hopefuls will make closing arguments to New Hampshire voters Wednesday during a prime-time CNN town hall in Derry -- less than one week before votes are cast in the New Hampshire primary.

Former Secretary of State Hillary Clinton, Vermont Sen. Bernie Sanders and former Maryland Gov. Martin O'Malley will each field questions from these critical voters, CNN announced Sunday. CNN Anchor Anderson Cooper will moderate the event.

The town hall will take place just two days after the Iowa caucuses, which the latest polling shows is a tight race between Clinton and Sanders.

"We are delighted to partner with CNN on Wednesday's town hall here in New Hampshire," New Hampshire Democratic Party Chair Raymond Buckley said. "We have three incredible Democratic candidates running for president and this is a fantastic opportunity for voters in New Hampshire and around the country to hear their plans to build on the progress we've made just days before the New Hampshire primary."

Read More