Democratic presidential candidate Bernie Sanders, an independent U.S. senator from Vermont, speaks at Liberty University in Lynchburg, Va., on Monday, Sept. 14, 2015.
Democratic presidential candidate Bernie Sanders, an independent U.S. senator from Vermont, speaks at Liberty University in Lynchburg, Va., on Monday, Sept. 14, 2015. Steve Helber AP
Democratic presidential candidate Bernie Sanders, an independent U.S. senator from Vermont, speaks at Liberty University in Lynchburg, Va., on Monday, Sept. 14, 2015. Steve Helber AP