Many in the growing field of Democratic candidates have proposed reforming the nation's student loan programs, including dramatic restructuring of existing refinancing structures, but Warren appears to be the first to propose flat-out debt cancellation. Warren and others in the field, including Sens. Cory Booker, Kirsten Gillibrand and Kamala Harris, are backing the Debt-Free College Act , a bill that would cover all costs for students attending a public college without necessitating loans.