Four questions Silicon Valley should expect from Capitol Hill

Tomorrow, key figures at leading Silicon Valley technology companies will appear on Capitol Hill. Twitter CEO Jack Dorsey, Facebook COO Sheryl Sandberg, and a Google representative (lawmakers want Alphabet CEO Larry Page, the company wants to send lawyer Kent Walker) will answer questions from various members of Congress about bias, artificial intelligence, and, we suspect, whether these mammoth companies should continue to be the dominant communication platforms for most Americans. Here are some of the main themes to look out for in the discussions--and one overarching question that really should frame the debate. Key question: Why shouldn't you be broken up? Background: The economic clout of the tech giants--and its implications for other areas of their influence--has sparked considerable debate already this year.