House Democrats recommend Congress look at ways to force the companies to split off some of their businesses, saying the tech giants have exploited their power to benefit themselves and hurt rivals.
Senators pressed the tech giant on the scope and scale of its digital advertising business. Republicans repeated long-running allegations of conservative bias.
The CEOs tell Congress that the giant American tech companies do not stifle competition, saying the concern that too much power is concentrated in too few companies is unfounded.
The first congressional testimony by Jeff Bezos comes at a time when he and Amazon are seeming at their zenith, occupying ever-growing space in American culture.
