Democratic presidential candidates Sen. Elizabeth Warren, former Vice President Joe Biden and Sen. Bernie Sanders participate in the November Democratic presidential primary debate.

Democratic presidential candidates Sen. Elizabeth Warren, former Vice President Joe Biden and Sen. Bernie Sanders participate in the November Democratic presidential primary debate.

Democratic presidential candidates Sen. Elizabeth Warren, former Vice President Joe Biden and Sen. Bernie Sanders participate in the November Democratic presidential primary debate.

Democratic presidential candidates Sen. Elizabeth Warren, former Vice President Joe Biden and Sen. Bernie Sanders participate in the November Democratic presidential primary debate.