How social media changed America

The Americast team delve into how conspiracy theories evolve online and how misinformation is affecting US politics, with the help of our Undercover Voters and Barack Obama’s former deputy national security adviser Ben Rhodes.US Special Correspondent Katty Kay is back from her trip on Route 66 meeting voters ahead of the midterms. President Joe Biden and Florida’s Republican governor Ron DeSantis have put their political clashes on hold to show a united front over Hurricane Ian. The pair shook hands on the president’s visit to see the devastation left by the storm.This episode is made by Phil Marzouk and Alix Pickles. The studio director is Emma Crowe. The assistant editor is Louisa Lewis. The senior news editor is Jonathan Aspinwall. Email Americast@bbc.co.uk with your questions and comments. You can also send us a message or voice note via WhatsApp, to +44 330 1239480