MoveOn.org is endorsing Democratic presidential candidate Sen. Bernie Sanders (D-VT).

The group, which was formed to support President Bill Clinton during his impeachment in the 1990s, has chosen to endorse Sanders rather than former Secretary of State Hillary Clinton.

In a statement released Tuesday, Ilya Sheyman, MoveOn Political Action’s executive director, vowed to help Sanders turn out voters in early states.

“This is a massive vote in favor of Bernie Sanders, showing that grassroots progressives across the country are excited and inspired by his message and track record of standing up to big money and corporate interests to reclaim our democracy for the American people,” Sheyman said.