Newark, NJ (AP)-- A northern New Jersey man has pleaded guilty to making a threatening phone call to Louisiana Governor Bobby Jindal.

A federal judge in Newark accepted Ronnie McMillian Jr.'s plea agreement Wednesday. The 28-year-old admitted to making the call to Jindal last September and leaving a voicemail saying Jindal and other Republicans would "get a bullet in your head."

At the time of his arrest last December, prosecutors said McMillian regularly called the offices of public officials and used vulgar language to attack the official's position on gay rights. He was alleged to have made calls to a staffer for Representative Michelle Bachman and to the offices of several other members of Congress.

McMillian faces up to five years in prison and a maximum fine of $250,000 when he's sentenced in January.

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