Bernie Sanders, 77, is an independent member of the U.S. Senate from Vermont who caucuses with the Democratic Party.
Sanders supports Medicare for all, the Green New Deal, a $15 minimum wage, expanding the estate tax, limiting the size of banks, and tuition-free college.
He is serving his second term in the U.S. Senate after winning re-election in 2012 with 71 percent of the vote. His previous 16 years in the House of Representatives make him the longest serving independent member of Congress in American history, according to his campaign.
Sanders lectured at Harvard University and Hamilton College in New York, in addition to working as a carpenter and a journalist. He was the mayor of Burlington, Vermont, from 1981 to 1989.