Controversy over HHS secretary nominee Robert F. Kennedy Jr.’s varying stances on abortion are likely to continue after his appearances on Capitol Hill this week, during which he said that he would direct FDA and the National Institutes of Health (NIH) to further study the safety of the abortion drug mifepristone, that President Donald Trump hasn’t taken a position on the pill’s access, and that he didn’t know whether federal law requires hospitals to provide emergency abortions. RFK Jr. told...