Five Republican presidential hopefuls gathered in Miami on Wednesday for the third debate of the primary cycle, where they focused their attacks on each other while mostly avoiding former President Donald Trump, the clear front-runner. Florida Gov. Ron DeSantis, former U.N. Ambassador Nikki Haley and entrepreneur Vivek Ramaswamy trained their fire on each other, while former New Jersey Gov. Chris Christie and Sen. Tim Scott struggled for air time. CBS News chief election and campaign correspondent Robert Costa has more.