That's a weird chart. For starters, Sanders draws support from way more than just young people. He has the support of pretty much all leaches and communists no matter their age, except for those who think having a vagina is the most important qualification - that's Hillary's group. Trump's crowd are the folks who are both really angry and stupid. Cruz's group is plenty angry but still believes in a Constitution and stuff. And Kasich's group mostly thought they were answering a survey on diet soda preference, and just went with the least threatening choice.