A rural Alaska man who threatened to kill the state’s two U.S. senators in a series of profanity-laced voice messages left at their offices in Washington, D.C., has pleaded guilty to making the threats in exchange for having other charges dropped.

Jay Allen Johnson, 65, entered his guilty pleas Monday in federal court in Fairbanks to two counts of threatening to kill a U.S. official. U.S. District Judge Ralph Beistline accepted Johnson’s pleas and set sentencing for April 8.

Johnson, who has been in custody since his arrest Oct. 4, has asked for an earlier sentencing.

He faces up 10 years in jail on each charge and will be under a protective order for three years not to contact either U.S. Sens. Lisa Murkowski or Dan Sullivan, any of their family members or staff.

He also must forfeit two pistols, three revolvers, a shotgun and a rifle found at his home in the small community of Delta Junction. He’s not legally able to own handguns because he’s a felon for repeated drunken driving convictions.

In exchange for his guilty plea to the two counts, the government agreed to drop four other charges against Johnson, including making interstate threats and threatening to damage property by fire or explosives.