Those six men were charged with conspiracy to commit kidnapping, which can carry a life sentence. Their names were listed in court documents as Adam Fox, Kaleb Franks, Brandon Caserta, Ty Garbin, Daniel Harris and Barry Croft. Mr. Croft lives in Delaware and the other five live in Michigan, the authorities said. No lawyers were immediately listed for the men.
The authorities said that Mr. Fox and Mr. Croft had decided to “unite others” to “take violent action” against state governments that they thought were violating the Constitution and that Mr. Fox was the one to initiate contact with a Michigan-based anti-government group. The F.B.I. said he had talked of storming the Michigan statehouse with 200 men and trying Ms. Whitmer for treason.
Brian Titus, the owner of a vacuum store in Grand Rapids, Mich., said that he had hired Mr. Fox, whom he had known since childhood, and even