The White House said today that a broad Chinese hacking operation had infiltrated at least eight American telecommunication companies and that none of them have managed to remove these Chinese hackers from their systems.

Nick Schifrin has been following this all and joins us now. So Nick, what did the White House say today?

The White House gave new details on what is believed to be the largest hack on American

telecommunications firms in U.S. history.

As you said, Chinese hackers infiltrated at least eight communications firms in the United States,

and over the last one to two years, quote, dozens of telecommunications companies across Asia and Europe, and the hack was ongoing.

Deputy National Security Advisor for Cyber and Emerging Technology, Ann Newberger said today.

The effective companies are all responding. Right now, we do not believe any have fully removed the Chinese actors from these networks.

So there is a risk of ongoing compromises to communications.

Until U.S. companies address the cybersecurity gaps, the Chinese are likely to maintain their access.

Today, intelligence officials were on the hill briefing all 100 senators in a classified hearing about the Chinese hackers known as Salt Typhoon, and our Lisa Desjardin caught up with Texas Republican

John Cornyn.

The Chinese Communist Party has infiltrated the total communication systems here in the United

States in a dramatic

and unprecedented sort of way. And it's a subject of tremendous concern. I'm sure you're going

to hear more about it because it affects a lot of people and not just in this country, but around

the world. Yesterday, Jeff, a senior FBI official admitted the Bureau still did not know how deeply the Chinese hackers had penetrated,

even though the Bureau had been investigating since the spring.

And it could take years to know the true scope of the hack.

Do we know, though, who has been targeted?

Intelligence officials describe three baskets, or three groups of targets essentially.

Number one, a large number of users whose phone metadata was stolen. Number two, a small group of

...