A "sovereign citizen" who claims he's a "crown prince emperor" can't remove his case to federal court, a judge has ruled.
What are "sovereign citizens"? They're Americans who, for some reason, don't believe the law applies to them. They are real problems in some parts of the country, where they gum up local court systems by filing copious documents containing ridiculous legalese and citations lifted out of context from court opinions.
Sovereign citizens claim the U.S. government has no power over them, as they are their own sovereign nation, and they're governed by English common law (if they're governed by anything at all). Their antics can from delightfully misanthropic to seriously dangerous.