A Massachusetts man has pleaded guilty to charges that he sent a bomb threat to the Arizona Secretary of State’s office in 2021, the Justice Department announced Friday.

James Clark, of Cape Cod, sent a message to the secretary of state’s office via its website demanding the secretary “resign by Tuesday February 16th by 9 am or the explosive device impacted in her personal space will be detonated,” according to the DOJ. Now-Governor Katie Hobbs (D) served as Arizona secretary of state when Clark made the threats.

“Threatening public officials is a serious matter, never warranted by the situation no matter how heated or politically charged,” Arizona federal prosecutor Gary Restaino said. “Cases like this are important in protecting not only the public official victimized by the conduct, but also the integrity of our election processes as a whole.”