Edward Douglass White, Public Service Company of Northern Illinois v…
“ It follows necessarily, therefore, that although the Constitution did not limit the power of the states to create courts and to confer upon them such authority as might be deemed best for state purposes, that right could not, by its exertion, restrain or limit the power of the courts of the United States by bringing within the state judicial authority subjects which in their constitutional sense were nonjudicial in character, and therefore not within the implied or express limitation by which courts of the United States were restrained from staying judicial proceedings in state courts. ”
