In Pennsylvania, Michigan and Wisconsin — all tight races — we see the larger contours of the entire presidential contest ahead of the first Harris-Trump debate. What makes these states close? We'll unpack some of the factors that stand out, including who's seen as better for key voter groups, who voters think has the cognitive health to serve and what to make of the campaign and social-media rhetoric. One one hand: Trump leads with voters who just don't think they're better off financially since the pandemic, whose incomes aren't keeping up with inflation and especially with non-college and White voters...