Break up Amazon? That's what Sen. Elizabeth Warren is proposing.

She issued a campaign pledge on Friday that if she's elected president she'll push to break up big tech companies like Amazon, Facebook and Google.

In a post on Medium, Warren said those companies have too much power over e-commerce and Internet traffic.

Her plan would divide large tech platforms from any participant on that platform.

For Amazon, that would mean undoing its mergers with Whole Foods and Zappos.

Facebook would have to split off WhatsApp and Instagram, and Google would have to unwind itself from Nest, Waze and DoubleClick.

An Amazon representative said by email that the company would not comment.