GOP Sen. Bill Cassidy of Louisiana on Sunday railed against Robert F. Kennedy Jr. for what he called a "series of failures" at the helm of the Department of Health and Human Services. "This has been a failure. If I were president, I would choose someone else because there needs to be accountability for higher health care costs, more measles deaths, losing elimination status, and no progress on processed foods," Cassidy said on "Face the Nation with Margaret Brennan."