Are There Parameters for Elon Musk's Twitter?

The blue tick, Silicon Valley sackings and Donald Trump. What impact is all this having on America? A former content moderator at the company, who was fired by Musk, helps us answer that question.

And while many say Twitter is going off-the-rails, we talk through the US railroads. What’s working for them and what isn’t?

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 and Alix Pickles. The studio director was Emma Crowe. The assistant editor was Sam Bonham. The senior news editor was Jonathan Aspinwall.