The U.S. abortion rate fell dramatically. Will Trump learn the right lessons?

A new study found that the U.S. abortion rate fell dramatically between 2008 and 2014, thanks in large part to more people using effective birth control. But researchers are worried that lawmakers won’t learn the right lessons from the study’s findings — and that recent progress in the area is already being reversed under the Trump administration.

One of the other central findings of the study, authored by Guttmacher Institute researchers Rachel Jones and Jenna Jer...