Watch CNBC's full interview with Walmart CEO Doug McMillon

Walmart CEO Doug McMillon joins CNBC's 'Squawk Box' to discuss the health of the U.S. consumer amid the busy holiday shopping season. McMillon also provides an update on the tight labor market and breaks down the company's e-commerce strategy. "A lot of our growth the last couple of quarters has come from people who are coming to Walmart to save money," McMillon tells CNBC.