Dick Van Dyke: I Feel the Bern -- But Sanders Isn't 'Castable' as President

In celebration of his 90th birthday, legendary actor Dick Van Dyke shares his personal philosophies on aging in a new book, Keep Moving and Other Tips and Truths about Aging. Van Dyke challenges all of us to stay active, engage the world around us and be enthusiastic about growing old.

In this clip, he shares his views on this year's most senior presidential candidate, Bernie Sanders, age 74, and sounds off on the dysfunction of the American political system.

For more of our conversation, be sure to tune in to Tavis Smiley on PBS. Check our website for your local TV listings: www.pbs.org/tavis.