House China cmte. chair Rep. Gallagher on Apple letter: We just want to understand what happened

House Select Committee on China Chairman Rep. Mike Gallagher (R-Wis.) joins 'Squawk Box' to discuss the committee's letter to Apple CEO Tim Cook questioning the reasons behind the cancellation of Jon Stewart's show on the company's streaming platform, the fallout from Chinese President Xi's dinner with top American CEOs, and more.