Republican Sen. Roger Marshall of Kansas, who was a health care provider earlier than being elected to the U.S. Senate, joined “Face the Nation with Margaret Brennan” to debate latest modifications to vaccine insurance policies within the U.S. and the way Well being and Human Providers Secretary Robert F. Kennedy, Jr., has impacted the CDC since his appointment. Kennedy confronted scrutiny from lawmakers on each side of the aisle in a Senate listening to on Thursday for his modifications to the CDC.