Dr. Leana Wen, the former Baltimore public health commissioner who was the first physician to helm Planned Parenthood in roughly 50 years, abruptly announced Tuesday that she is leaving the organization due to “philosophical differences” with its leadership. “As a physician and public health leader, I came to Planned Parenthood to lead a national health care organization that provides essential primary and preventive care to millions of underserved women and families, and to advocate for a broad range of policies that affect our patients’ health,” Wen wrote in a statement posted on Twitter.