Trump replied to each by calling Rubio a 'choker' and Cruz a 'liar.' John Kasick and Ben Carson looked on as the three attacked each other. It even prompted Carson to jokingly say, "Someone please attack me so that I can talk." After winning three states, Trump has become a bigger target since he is already getting the delegates. Rubio is seen as the Republican party's preferred candidate and clearly was out to make the case that he is much better than Trump.