The U.S. presidential race is intensifying as both Joe Biden and Donald Trump focus on crucial swing states, with Arizona, Georgia, Michigan, Nevada, Pennsylvania, and Wisconsin being key battlegrounds. Trump's lead in Iowa and other Midwestern states raises questions about Biden's appeal. Polls indicate some crossover voting, with a small percentage of Trump 2020 voters now planning to vote for Biden. Meanwhile, J.D. Vance has emerged as the favored choice for Trump's vice-presidential pick in a recent straw poll. Biden's campaign is urged to address the needs of black voters in Michigan to secure a win.