The nation's capital is taking on Amazon. DC Attorney General Karl Racine says the e-commerce giant is acting like a monopoly and using its significant sway to force third-party sellers to offer products at the cheapest rates on its platform. "This practice must stop," he told Cheddar, adding, "We all know that Amazon is a titan on the online marketplace and it's using its power in a way that artificially keeps prices high. That's illegal under the antitrust laws."