What we saw with both Donald Trump and Marco Rubio, that...

What we saw with both Donald Trump and Marco Rubio, that their response, whenever you point to anything in their record, is just to yell, "Liar, liar, liar," and to get very personal and to make direct character attacks. And my approach, from the very beginning of this [President's] campaign, starting a year ago [in 2015], is that I will not respond in kind. I do not intend to insult any of the candidates.