I've heard a lot of people saying "Anglo-Saxon" when they mean "Anglo-American." At least, I think I'm not insane, and that "Anglo-American" is really the way to say it. Otherwise, why not just say "Anglo" and avoid the extra work? Especially when speaking of a certain school of political theory, I'm pretty sure you want to be referring to the two most important exhibitors of that kind of political thought, and not refer to the ethnicity of the inhabitants of the British Isles.
Nick, you know about these things; I'm almost sure I'm right. Let me know.
In other news, I'm pretty much sleeping every other day, my insomnia is that bad.