Tim Cook says he is 'really pleased' with progress on stitching together Apple's end-to-end silicon supply chain in the U.S.

Tim Cook says he is 'really pleased' with progress on stitching together Apple's end-to-end silicon supply chain in the U.S.

In an interview with CNBC's Jim Cramer, Apple CEO Tim Cook struck an optimistic tone about the iPhone maker's progress bringing more manufacturing to the U.S.