A 500% drop. That's what RFK Jr is actually describing. If a drug goes from $600 to $100, that's a drop of $500 on a base of $600. That's an 83% reduction, not 600%. The senator was right. It is mathematically impossible. Because RFK Jr doesn't know what percent means. Trump's response: "Right." Two of the most powerful people in American healthcare policy, confidently wrong in unison.