President Donald Trump threatened to open an investigation targeting Chris Christie over \

President Donald Trump threatened to open an investigation targeting Chris Christie over \

Trump unloaded on the former presidential candidate and friend-turned-foe after an appearance critical of the president on television.

President Trump floated the idea after the former governor of New Jersey, a onetime ally, criticized his use of the Justice Department.

President Donald Trump is threatening to investigate former New Jersey Gov. Chris Christie, as he continues to use the Justice Department to punish political adversaries.