Cal Thomas is one of the most widely syndicated newspaper columnists in the United States, as well as a weekly contributor to The Last Word's US slot.
His latest book, America's Expiration Date: The Fall of Empires, Superpowers . . . and the Future of the United States, is out now.
Cal joined us to talk about the book and what he thinks the future holds for America.
Listen to the interview in full by pressing the play button on this page.