Pro-life Americans often get criticized for focusing too much on babies in the womb and not enough on those who’ve been born. Yet countless evangelical Christians devote their lives to foster care, adoption and similar services for vulnerable children. As born-again Christians, we have been adopted by Christ and have a special obligation to those who need a mother and father.

But those who want to live out these convictions frequently find themselves stopped by the government. Last week the Trump administration took a major...