“I say, Joe, the United States Senate’s like school. They tell you where to go, where to sit, then they tell you what you’re going to talk about that day,” Christie said in an interview with MSNBC’s “Morning Joe” taped at the Kemp Forum on Expanding Opportunity.

And to extend the metaphor, Christie said, Rubio is truant, calling attention to his missed votes in the Senate while campaigning for president.

“The truant officer is out looking for him,” said Christie, whose own public approval hit a new low in the latest Rutgers-Eagleton poll, as people in his home state have voiced strong disapproval with his job performance.