Questions swirl over best path forward to defeat Donald Trump

Guests: Symone Sanders-Townsend, Douglas Brinkley, Ezra Klein, Dahlia Lithwick About last night, through the eyes of the undecided. Tonight: how gettable voters viewed the debate—and what it means for the existential threat of a Trump presidency. Plus, as Barack Obama enters the conversation, the historical precedent and practical reality of picking a candidate at the convention. And today's radical opinion from the Supreme Court as we finally get word that a decision on Trump's immunity for insurrection is finally up next.