FARGO, N.D. (AP) — A man accused of using an ax to smash windows at the entrance of Republican North Dakota Sen. John Hoeven’s office in downtown Fargo has pleaded guilty in federal court. Thirty-year-old Thomas Starks, of Lisbon, is charged with destruction of government property. Investigators say the damage exceeded $1,000. Prosecutors have not outlined a motive in court documents. Investigators say Starks can be seen in security video walking up some stairs toward the entrance of Hoeven’s office. The video first shows him striking the intercom and security system and then hitting the windows with the ax. The plea agreement calls for prosecutors to recommend a sentence at the low end of the guideline range.