Democrats call for Congress to rein in and break up Big Tech

Amazon CEO Jeff Bezos speaks via video conference during a House Judiciary sub-committee hearing on anti-trust in Washington in July (Graeme Jennings/Pool/AP)

US Democrats are calling for Congress to rein in several Big Tech companies, possibly forcing Facebook, Google, Amazon and Apple to break up their businesses.

The steps would also make it harder for such firms to acquire others and impose new rules to safeguard competition.