President Trump defended his unapologetic love for diet soda by posing a bonkers theory that the fizzy beverage may kill cancer in the body, Centers for Medicare & Medicaid Services Administrator Dr. Mehmet Oz revealed. Oz, 65, recalled how Trump, 79, has made a point of showing off his candy stash and pressing his red button in the Oval Office to bring in a diet soda when meeting with the CMS boss and Health and Human Services Secretary Robert F. Kennedy Jr. “Then comes the diet soda pops, which your dad argues that diet soda is good for him because it kills grass [when] it’s poured on grass, so therefore, it must kill cancer cells inside the body.”