GOP campaign attacks accelerate ahead of S.C., Nev. battles

Four days before the South Carolina primary, the GOP contest has become a blur of blistering attacks, especially between Donald Trump, Ted Cruz, Marco Rubio and Jeb Bush. Political director Lisa Desjardins offers an update, and Jon Ralston of Ralston Live and Randy Covington of the University of South Carolina join Judy Woodruff to discuss the upcoming battles in their states.