 Both campaigns out today with fresh attack ads, the Trump campaign questioning Biden's mental fitness and the Biden campaign calling Trump a threat to democracy. Here's NPR's Asma Khalid. Well, sources within the Biden campaign, folks involved in Biden's debate planning, tell me that they believe this is about presenting a contrasting vision, whether it's on the economy, abortion, democracy, a whole host of issues. They fundamentally don't think voters are tuned in to the binary choice.