Citing in part Hillary Clinton’s support for higher wages and the right to unionize for healthcare workers, the Service Employees International Union has endorsed the Democrat, a former U.S. secretary of state, senator and first lady, for president of the United States.

“Hillary Clinton has proven she will fight, deliver and win for working families,” SEIU International President Mary Kay Henry said in a statement. The union says the endorsement comes after its leadership sought input from members via a conference, “tele-town hall” meetings, polls, local executive board debates and discussions with local union officers and others.

SEIU cited Clinton’s support of unionization and the Fight for $15 movement. “Clinton has recognized the value of care work in our nation, particularly the home care providers and child care teachers who help educate our future generations and allow our seniors and those with disabilities to live with dignity at home,” said a statement issued by the union. “In many places, these workers earn poverty wages with no sick or vacation time and few if any benefits.”

SEIU says it has 2 million members and that its healthcare-related arm, SEIU Healthcare, has 1.1 million members, making it the largest healthcare union in North America.