The president is said to be displeased with Robert F. Kennedy Jr., and Jimmy Fallon thinks he knows why. “According to a new report, President Trump told RFK Jr. he’s disappointed in him for not accomplishing more in his role as health secretary,” Fallon began. Kevin Lamarque/File Photo via Reuters“Trump is mad that RFK Jr. hasn’t produced proof for all of his medical theories... but in RFK Jr.’s defense, there isn’t any. “RFK Jr. was like, ‘Look, no one’s eating lettuce. Secretary of Health and Human Services Robert F. Kennedy Jr. was reportedly taken aback by the president's displeasure.