Why new Alphabet CEO Sundar Pichai may have most difficult job in Silicon Valley

Sundar Pichai will be the new CEO of Alphabet now that CEO Larry Page and President Sergey Brin are stepping aside. Alphabet under Pichai faces myriad challenges, ranging from antitrust investigations to internal employee revolts. CNBC's "The Exchange" team discusses the shakeup with Steve Kovach, CNBC.com's technology editor.