National Guard troops are typically under the control of state governors, but federal law empowers the president to call them into federal service if there is a danger of foreign invasion or “rebellion against the authority of the government.”Trump has pointed to immigration-related protests in Chicago and other cities to justify his attempts to use the guard. But the 7th Circuit judges rejected that rationale.A protest does not transform into a “rebellion” just because protesters are well-organized, advocate to overhaul the structure of government or use civil disobedience, Judges Ilana Rovner, David Hamilton and Amy St. Eve wrote. Nor do...