Thirteen men, including members of two right-wing militias, have been arrested for plotting to kidnap the Democratic governor of the US state of Michigan and spark a “civil war,” officials said Thursday. Michigan Governor Gretchen Whitmer thanked law enforcement for thwarting the kidnap plot and rebuked President Donald Trump for failing to condemn hate groups. Announcing the arrests, Michigan Attorney General Dana Nessel described the conspiracy to kidnap the 49-year-old Whitmer as a “serious and credible threat.”Andrew Birge, US attorney for the western district of Michigan, said six men were facing federal charges for conspiring to kidnap Whitmer from her vacation home. Birge said they had conducted surveillance of her residence and had even tested an improvised explosive device they intended to use to divert law enforcement away from her home.They were arrested by FBI agents and Michigan police on Wednesday as they met to “pool funds for explosives and exchange tactical gear,” the Justice Department said. Whitmer has been attacked repeatedly by Trump this year over her tough coronavirus lockdown and armed right-wing groups have staged protests in the state capital Lansing against her stay-at-home orders.“LIBERATE MICHIGAN!” Trump tweeted in April. “When I took the oath of office 22 months ago, I knew this job would be hard,” said Whitmer, who was on the shortlist to become Democrat Joe Biden’s vice presidential candidate. “I’ll be honest, I never could have imagined anything like this,” she said.