At just 26 years old, Ben Platt has already won a Tony, a Grammy and an Emmy award, all for his groundbreaking performance in the Broadway phenomenon “Dear Evan Hansen.” In this week’s “Sunday Sitdown,” Willie Geist talks to the actor about his journey from homemade musicals in his backyard to the bright lights of Broadway, to his latest starring role alongside Gwyneth Paltrow in the highly-anticipated new Netflix series “The Politician.”