In both parties, 2016 front-runners go on the attack

Aired: 1/22/2016 | 0:03:25 | Clip
As voting draws near, Republican front-runners Donald Trump and Sen. Ted Cruz escalated their rivalry by questioning one another’s conservative credentials, while the GOP establishment railed against both. Meanwhile, Democrat Hillary Clinton went after Sen. Bernie Sanders over Obamacare, and Sanders faced criticism over the lack of diversity in a new ad. Political director Lisa Desjardins reports.