Rep. Joe Kennedy III sits down to talk about why Democrats need a big, messy primary in 2020, the reason he thinks Joe Biden would've defeated Trump, his time as Elizabeth Warren's student at Harvard Law, and what it's like to learn about your family members in history class. Last week, Kennedy gave the Democratic response to President Trump's State of the Union speech. The rebuttal heralded Kennedy's arrival in the national conversation at a time when Democrats are desperate to find the right messenger to lead the part into the future. Could that messenger be Kennedy himself? He’s a 37-year-old congressman at a time when the best-known figures in the party have wrinkles and gray hair; he’s started to make a name for himself as a leading liberal voice on health care and other issues; he chairs Congress’s Transgender Equality Task Force; he speaks fluent Spanish from his service with the Peace Corps in the Dominican Republic; he met his wife in Elizabeth Warren’s class at Harvard Law. He has the most revered family name in all of Democratic politics.  Listen to the full interview now, and visit POLITICO Magazine to read the whole story.