evidence: Fentanyl is driving these numbers — and it is everywhere. We’ve had more Americans die of fentanyl poisoning than were killed in the Iraq, Afghanistan and Vietnam wars combined. According to the Centers for Disease Control and Prevention, fentanyl overdose is now the leading cause of death for Americans ages 18 to 45. Yet fentanyl was only briefly mentioned in last week’s presidential debate, and then only in the context of the border crisis, which seems to be the only time it gets mentioned. [...] As Tony Mattivi, Director of the Kansas Bureau of Investigation told me recently, "When you look at the faces of the people that are dying from fentanyl, it looks like you’re just ripping pages out of a high school yearbook."