the great tragedies, human tragedies of recent years is children came from honor overture as - h oshg nduras. i said welcome those children into that condition. hillary clinton said send them back. >> reporter: the tone of the debate at times tense as each candidate tried to score political points knowing in less than a week the state of florida will hold its presidential nominating contest and a large number of those voters will be latino. >> in 2006 senator sanders supported indefinite detention for people facing deportation and stood with the minute men vigilantes in their ridiculous absurd efforts to "hunt down" immigrants >>> to. i do not support them and that is an horrific and unfair statement to make >> reporter: there were questions of character in the debate that only hillary clinton can answer or chose not to answer like her decision to use a private email server as secretary of state. it is a choice she has apologised for but is still being investigated by the f.b.i. >> if you get indicted will you continue? >> that's not going to happen. i'm not going to answer that question >>