Hunter Biden plea: President's son pleads 'not guilty' after judge blows up plea agreement

President Joe Biden's son Hunter pleaded "not guilty" in court Wednesday after a federal judge in Delaware said she was not ready to accept a so-called "sweetheart" plea deal after the prosecution revealed the investigation was ongoing.

Hunter Biden, 53, through his attorneys, had argued the prearranged plea deal should be accepted in its entirety. It included the younger Biden pleading guilty to two misdemeanor tax charges and entering a diversion agreement for a felony gun charge.

U.S. District Judge Maryellen Noreika acknowledged during the hearing that the concerns she raised over the terms of the deal were a "curveball" after she had been expected to accept the arrangement.

"I am concerned you are taking provisions out of the plea agreement," Noreika said.