Amy Glass is a California native who loves to ride horses and target shoot. She recently joined Martese Chism — a diehard sports fans from Chicago — and Irma Westmoreland — a grandmother from Augusta, Georgia — on a bus trip to South Carolina. The women have little in common, except that they are all nurses and they all support Bernie Sanders.

The nurses came together to visit South Carolina ahead of today’s Democratic primary, hoping to talk with voters about issues like universal health care, a $15 an hour minimum wage, and free higher education. After Iowa, New Hampshire, and Nevada, South Carolina Democratic Party voters are up next in America’s long and arduous primary process.

South Carolina is an important state for Sanders and his supporters. National political pundits have dubbed it Clinton’s “firewall” because Democratic voters in the state, a majority of whom are African American, have less familiarity with the Vermont senator.