GAY MARRIAGE & THE CONSTITUTION:  The Supreme Court on Tuesday and Wednesday will hear the most significant constitutional cases of this term, both dealing the the constitutionality of laws defining marriage as “one man, one woman.”  At stake is the scope and meaning of the Equal Protection Clause, the principle of federalism, and the meaning of the doctrine of “standing” to sue.   This excellent editorial by the Wall Street Journal dissects what is at stake in these cases, and the analytical options facing the Court for each.