Explore the 7 basic principles of the US Constitution: popular sovereignty, limited government, checks & balances, judicial ...

Asked on 'Meet the Press' whether he needs to uphold the U.S. Constitution, President Trump flatly said, 'I don't know.' And you know what? I agree.

Hit the road with Peter Sagal in CONSTITUTION USA as he travels cross country to find out where the Constitution lives, how it works, and how it unites us.