This does not, however, necessarily imply that the two governments possess powers in common, or bring them into conflict with each other. It is the natural consequence of a citizenship which owes allegiance to two sovereignties, and claims protection from both. The citizen cannot complain, because he has voluntarily submitted himself to such a form of government. He owes allegiance to the two departments, so to speak, and within their respective spheres must pay the penalties which each exacts for disobedience to its laws. In return, he can demand protection from each within its own jurisdiction.
United States v. Cruikshank (1875)