Democratic fight heats up as candidates dash across N.H.

Hillary Clinton and Sen. Bernie Sanders clashed in MSNBC’s Democratic debate Thursday night, with Sanders attacking Clinton for her ties to Wall Street, while Clinton questioned Sanders’ foreign policy grasp. Meanwhile, former first lady Barbara Bush touted her son Jeb in New Hampshire as snow slowed campaigning for some GOP candidates. Political director Lisa Desjardins talks with Judy Woodruff.