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Sen. Mark Warner: Users should know what their data is worth to tech companies

At Wednesday's historic antitrust hearing, lawmakers accused the CEOs of Alphabet, Apple, Facebook and Amazon of being so powerful that they've squashed the competition. Sen. Mark Warner (D-Va.) joins "Squawk Box" to discuss the testimony as well as some of the efforts he has spearheaded to regulate Big Tech.
Thu, Jul 30 20209:35 AM EDT