Gee, you liked that line when another guy used it.

Romans 2: 14 So, when Gentiles, who do not have the law, instinctively do what the law demands, they are a law to themselves even though they do not have the law. 

It is a basic principle of moral theology that invincible ignorance renders one inculpable.

As far as I can tell the president-elect is not a Catholic and I have no idea what beliefs he has been taught. Do you?

So, like St. Paul, I can only say that we who know the law must keep the law, and for those who do not, they will be judged on the law in their hearts.

Oh, and by the way divorce and adultery are immoral, period, whether one knows that or not.