You are right. Not sure if there is any data to prove this, but I would guess that marriage rates might coincide along red-state, blue-state break downs in a manner that family size and abortion rates do.
"I would guess that marriage rates might coincide along red-state, blue-state break downs in a manner that family size and abortion rates do."
Let's look on the bright side -- over time, there will be fewer liberals, and more conservatives. We just have to be patient, and do more of what comes naturally...
Actually, most of the states with the higest divorce rates are red states:
http://www.statemaster.com/graph/lif_div_rat-lifestyle-divorce-rate