With the midterms approaching, Democrats and Republicans are fighting to control the national conversation. This week, On the Media looks at how to assess the predictions about a blue or red wave this November. Republican messaging — especially from the White House — has emphasized the dangers presented by the so-called caravan. How did that caravan begin? And, what is the history behind the documents that regulate international travel? Plus, how transgender rights activists in Massachusetts are deploying a counter-intuitive door-to-door tactic.

1. Clare Malone [@ClareMalone], senior political writer for FiveThirtyEight, on the electoral reporting tropes that dominate midterm coverage. Listen.

2. Sarah Kinosian [@skinosian], freelance reporter, on the origins of the current Central American caravan. Listen.

3. John Torpey [@JohnCTorpey], historian at the CUNY Graduate Center, on the history of passports. Listen.

4. David Broockman [@dbroockman], political scientist at the Stanford Graduate School of Business, and Matt Collette [@matt_pc], producer of WNYC's Nancy, on the activism surrounding a transgender rights referendum in Massachusetts. Listen.

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