From a story on politico.com by David Cohen headlined “Chris Christie, responding to quips about his weight, tells Trump to ‘look in the mirror'”:

Former New Jersey Gov. Chris Christie on Sunday mocked Donald Trump, his fellow Republican presidential candidate, for Trump’s recent quips about his weight.

“Oh, like he’s some Adonis?” Christie said to host Howard Kurtz on Fox News’ “Media Buzz,” saying that his longtime struggles with his weight have nothing to do with whether he is qualified to be president.