Which state has a fringe political group that aims to hold a referendum in 2018 on whether to secede from the United States or not?

A fringe political group in California wants to opt out of Donald Trump's presidency by leaving the union. The Yes California Independence Campaign aims to hold a referendum in 2018 that, if passed, would bring California one step closer to becoming an independent country. There is no clear path for how California might appeal to the federal government so that it may leave. "The legality of seceding is problematic," Eric McDaniel, associate professor of government at the University of Texas at Austin, told The Texas Tribune in June, at the height of Brexit hysteria. "The Civil War played a very big role in establishing the power of the federal government and cementing that the federal government has the final say in these issues". The US Constitution lays out procedures for how a new state may enter the union, but there are no protocols for a state to exit.