As the 2016 White House race unfolded, the Facebook home of one of Princeton University's best-known scholars was packed with cries for help.

The battle lines were clear. Religious conservatives wanted to know if they had to choose between Hillary Clinton and Donald Trump. Was picking the "lesser of two evils" still evil? Was it morally wrong to refuse to choose?

Robert P. George made his own convictions clear.

"If you truth bomb Trump but go silent on Clinton, shame on you," wrote George, an outspoken Catholic and distinguished professor of jurisprudence at Princeton. "If you truth bomb Clinton but go silent on Trump, shame on you. Whole truth!" In another salvo he added: "A ghastly choice for Catholics & others: One will taint and bring disgrace on our moral values. The other will wage unrelenting war on them."

With Election Day drawing near, George finally republished a note from June, pleading for charity in these arguments.

"Friends, we are in a terrible fix here. And it is putting some of us at each other's throats. It must not be permitted to do that. Donald Trump is dreadful. Hillary Clinton is horrible. One called for the killing of the innocent family members of terrorists. The other promises to protect the killing of unborn babies up to the point of birth," he wrote.

"For some of us, it just isn't obvious which of these two scoundrels would do greater harm in the long run," he argued. Whatever happens, those "who believe in limited government, constitutional fidelity and the Rule of law, flourishing institutions of civil society, traditional principles of morality, and the like are going to have profoundly important work to do. And we will need to do it together."

Yes, Republicans face what many are predicting will be a "civil war" between Trump insurgents and the party establishment, said George, in a telephone interview.