As more states legalise marijuana, the team explore how America's relationship with the drug has changed. They interview a drug historian and a former adviser to Clinton, Bush Jnr and Obama on drug policy.

Americast is presented by North America editor Sarah Smith, Today host Justin Webb, the BBC's Social Media and Disinformation Correspondent Marianna Spring, and North America correspondent Anthony Zurcher.

Find out more about our "undercover voters" here: https://www.bbc.co.uk/news/world-us-canada-63530374

Email Americast@bbc.co.uk with your questions and comments and send us a message or voice note via WhatsApp, to 03301239480.

This episode was made by Phil Marzouk, Alix Pickles, Cordelia Hemming and Paige Neal-Holder. The studio director was Emma Crowe. The assistant editor was Sam Bonham. The senior news editor was Jonathan Aspinwall.