Under the close gaze of his critics - and millions of American voters - Joe Biden delivered arguably the most significant State of the Union address in recent times.

The president chose to focus on his economic record, his plans to to fix America's immigration system and repeatedly took aim against Donald Trump.

The Americast team chew over the president's speech with the help of Joe Biden's former speechwriter, Jeff Nussbaum, who told us what it's like to work with him and how you judge the success of a speech like the one Biden just delivered.

HOSTS: • Justin Webb, Radio 4 presenter • Marianna Spring, disinformation and social media correspondent • Sarah Smith, North America editor

GUEST: Jeff Nussbaum, former speechwriter for Joe Biden

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This episode was made by George Dabby with Rufus Gray, Catherine Fusillo, and Claire Betzer. The technical producer was Philip Bull. The series producer is George Dabby. The senior news editor is Sam Bonham.