This is the exact opposite of H.H. Leo XIII in Immortale Dei:
*No it isn't. Pope Leo does not say a State must declare Jesus is Lord.
FWIW I readily admit you and others who personally favor Monarchy are widely and deeply read in the matter; far more than I will ever be.
My only point is I don't recall ever reading HM Church mandating any particular form of government; just the opposite.
Still, I think rehearsing all these arguements are helpful and informative and when it comes to ideas about establishing a Monarchy in America and,as an Irishman, I admire any and all forms of such fruitless causes :)
Oh, I forgot to add..I agree with Kalb. When men like Rush laugh at the left and say it had lost its power and it can't get its agenda implemented, he fails to acknowledge that is has already, largely, acheived its goals.