'A flat lie': Biden and Bernie Sanders fight over Social Security

INDIANOLA, Iowa — Joe Biden ripped into Vermont Sen. Bernie Sanders and his campaign over what he believes is a smear about his past views on entitlements.

The comments came during question and answer session at an Indianola town hall, after an attendee asked the former vice president to clarify his position on Social Security. A series of viral videos shared by Sanders speechwriter David Sirota show Biden calling for cuts to the program.