The governors in the Saturday night New Hampshire debate challenged the senators to point to their "accomplishments" in the Senate, whereas the governors touted their experience to "get things done." This is typical of big-government Republicans who look on Congress as a factory that produces laws and that in their view is the only thing that counts as an accomplishment. But often in Congress, your freedom is more often best protected by lawmakers who stop bad bills rather than pass them.
When Gov. Christie attacked Sen. Rubio, it was because he said Rubio could not claim credit for passing many bills. Sen. Rubio replied that the results of Gov. Christie included the fact that Moody's Investor Service has downgraded the credit rating of New Jersey nine times since Christie became governor and Christie never answered the question.
Both attacks in both directions were not completely fair. Sen. Rubio has served in the Senate majority for one year and before that no Republican bills passed under Sen. Harry Ried. Gov. Christie has faced a Democratic legislature his entire time in office.
But Christie's attack and that of other governors was worse, because as big-government Republicans they assume the duty of Congress is to pass more laws rather than repeal bad ones already on the books.