Two men were charged with threatening Michigan public officials because they were angry with the November election results, the state's top prosecutor said.

Michigan Attorney General Dana Nessel's office announced the arrests of Daniel Thompson, 62, and Clinton Stewart, 43, in a press release on Tuesday.

Thompson, who lives in Harrison, Michigan, allegedly left a Jan. 5 voicemail for Democratic U.S. Sen. Debbie Stabenow that contained vulgar language and threatened violence.

In the message, Thompson identified himself as a Republican and said he was angry about the 2020 election, the attorney general's office said. He also allegedly said that he had joined a state militia and added there would be violence if the election results were not changed.

Read more: NBC News