Cassidy’s public struggle over Trump's pick for health secretary was the latest chapter in a difficult relationship with his party's leader, and he faces a GOP primary race next year.

After Louisiana U.S. Sen. and doctor Bill Cassidy put aside his doubts over vaccine skeptic Robert F. Kennedy Jr.'s fitness to oversee our nation's health care, columnists Quin Hillyer and Stephanie Grace discuss whether his decision digs him out of a political ditch.

Kennedy promised not to alter the childhood vaccine schedule. Now he's vowing to investigate the regimen designed to prevent measles, polio and other diseases.

The Senate voted 53-47 to end debate on Robert F. Kennedy Jr.’s nomination, following public statements of support from some GOP senators who had been on the fence about President