A busy week for President Biden! On the first anniversary of the Russian invasion, he made a surprise trip to Kyiv to meet President Zelensky, pledging to support Ukraine for "as long as it takes". Biden then gave a speech in Poland to reaffirm America's commitment to Nato. Sarah was on the trip and shares her impressions, and the Americast team also talk to Assistant US Secretary of State Karen Donfried.

In Kentucky, a Christian university campus went viral on TikTok after one of its church services turned into a continuous worship session lasting two weeks. We speak to a student about the so-called "Asbury Revival".

And former President Jimmy Carter, 98, has been moved to hospice care. Carter served just one term between 1976 and 1980, but what will his legacy be?

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 [email protected] with your questions and comments and send us a message or voice note via WhatsApp, to +44 3301239480.

This episode was made by Phil Marzouk, Cat Farnsworth and Alix Pickles. The studio director was Mike Regaard. The assistant editor was Simon Watts. The senior news editor was Sam Bonham.