Nine of the 10 states with the highest teen birthrates voted Republican in 2016. And nine of the 10 states with the lowest teen birthrates voted Democratic.

“Red regions of the country have higher teen pregnancy rates, more shotgun marriages and lower average ages at marriage and first birth,” Naomi Cahn and June Carbone wrote in their important 2010 book, “Red Families v. Blue Families.”

The liberal impulse may be to gloat: Those conservatives thunder about “family values” but don’t practice them. But there’s also perhaps a measure of hypocrisy in the blue states. As Cahn and Carbone put it: “Blue family values bristle at restrictions on sexuality, insistence on marriage or the stigmatization of single parents. Their secret, however, is that they encourage their children to simultaneously combine public tolerance with private discipline, and their children then overwhelmingly choose to raise their own children within two-parent families.”