Chris Christie on Donald Trump: Anybody Can Do Well For a Month (VIDEO)

Christie on the 2016 race- We're a long way away from the Iowa Caucuses. 4 years ago, Herman Cain led the polls. 8 years ago, Rudy Giuliani led the polls

Chris Christie says it's too soon to see whether Donald Trump's rise to the top of national Republican polls will last until votes are actually cast beginning in six months.

"Donald is going to be as serious as Donald wants to be. And he's going to determine through the depth of his answers and the seriousness of his answers whether he is a serious candidate or he isn't," Christie said in an interview with CNN's Jake Tapper aired Sunday on "State of the Union."

"Anybody can do well for a month in this business, especially if you have talent and personality, and Donald has both those things. Let's see how this goes over the course of time," he said.