New York (CNN Business) Democratic Rep. Alexandria Ocasio-Cortez has quickly become one of Washington's most prolific social media users, but this weekend the New York freshman said Silicon Valley companies had too much power and that "the current monopoly trend is societally and economically unsustainable."

Ocasio-Cortez's comments came in the aftermath of layoffs at a number of number of news organizations, including BuzzFeed and HuffPost.

"The biggest threats to journalism right now are tech monopolies & concentration of ownership," she tweeted on Saturday, adding: "The fact of the matter is the current monopoly trend is societally & economically unsustainable. We can't simply accept the cliché that 'journalism is dying.' Journalism will only die if we choose not to fight for it - and if journalism dies, our democracy will, too."

Since her primary victory, Ocasio-Cortez has shown a remarkable ability to use social media to amplify issues.

Her comments Saturday are likely to embolden critics -- and dial up the scrutiny -- of social media companies, particularly Facebook.

Read More