BY BILL BARROW, AP — The nation’s largest labor union has lined up behind Joe Biden’s presidential campaign, with the National Education Association on Saturday endorsing the former vice president for the Democratic nomination over his last remaining primary rival Bernie Sanders.

The NEA’s board of directors chose Biden following a recommendation from the organization’s political action committee board, following months of surveying the organizations 3 million members and multiple presidential candidate forums held around the country.

NEA President Lily Eskelsen Garcia, whose union tops 3 million members, called Biden a “tireless advocate for public education” and “the partner that students and educators need now in the White House.”