rubio. this is the second time in a few weeks that donald trump's personal attacks hurt him. first, his attack on carly fiorina, criticizing her looks backfired. now he just got booed for calling marco rubio a clown. but that's consistent for trump. what's changed is rubio's strategy. before he was keeping his head down, now he's started to taunt him. rubio said trump had a tough week, spoke to an etmpty room i south carolina, was embarrassed by carly fiorina and is an insecure guy. he's goading donald trump into attacking him. it's a deliberate strategy and it's working in rubio's favor. >> trump will go through the list of people, name by name, he talks about rick perry and scott walker and he says look what happens when people come after me, they plummet in the polls. but it doesn't seem like it's play iing out with rubio.