President Joe Biden is preparing for his debate next Thursday with former President Donald Trump as if he were “cramming for a final,” according to a former Biden aide. The former aide told NBC News that entails Biden talking things through, looking at briefing materials, and writing on cards how he might want to say specific things. Biden has famously relied on notecards when delivering talking points — and has still been unable to deliver those talking points correctly. However, Biden will be unable to use prepared notecards during the debate. According to the debate rules, no pre-written notes can...