• by Gavin O'Malley  @mp_gavin, April 9, 2018

Facebook “didn’t do enough to prevent [its] tools from being used for harm,” CEO Mark Zuckerberg plans to tell members of Congress on Tuesday.

The admission is included in Zuckerberg’s prepared testimony, which Congress released on Monday -- and which CNBC was first to publish.

On Tuesday, the embattled tech mogul is expected to appear before a joint hearing of the Senate Judiciary and Commerce committees, while he is scheduled to appear before the House Energy and Commerce Committee on Wednesday.

Much of the prepared testimony mirrors Zuckerberg’s comments in interviews and press calls since the Cambridge Analytica scandal first erupted.

Yet, Facebook’s CEO has never sounded more contrite.  

“We didn't take a broad enough view of our responsibility, and that was a big mistake,” Zuckerberg is expected to admit on Tuesday. “It was my mistake, and I'm sorry. I started Facebook, I run it, and I’m responsible for what happens here.”

In the more than 2,500-word testimony, Zuckerberg specifically addresses the Cambridge Analytica debacle, how Russian operatives used Facebook to interfere in the U.S. political process, and what the company is doing to address both issues.

“There’s no question that we should have spotted Russian interference earlier,” Zuckerberg is expected to admit.

Echoing earlier statements, Zuckerberg is also expected to suggest that preventing similar abuses in the future will “significantly” impact the company’s bottom line.

“I've directed our teams to invest so much in security -- on top of the other investments we’re making -- that it will significantly impact our profitability going forward,” Zuckerberg’s testimony reads. “I want to be clear about what our priority is: protecting our community is more important than maximizing our profits.”

Whether Zuckerberg’s words will appease U.S. lawmakers remains to be seen.

Facebook's CEO recently said that he is not necessarily opposed to the government regulating Facebook. For him, the question is: “What is the right regulation?”

Following the suspension of Cambridge Analytica, meanwhile, Facebook just blocked a second data-analytics firm from its platform. The firm -- New York-based Cubeyou -- reportedly used data-harvesting techniques similar to those employed by partners of Cambridge Analytica.

The news was first reported by CNBC.

Working with the University of Cambridge, Cubeyou reportedly utilized “personality tests” to build consumer data profiles. That’s the same method used by Cambridge University psychology professor Aleksandr Kogan in 2015.

As the world now knows, Kogan then violated Facebook’s platform policies by passing on his data to Strategic Communication Laboratories (SCL), including its political data analytics firm, Cambridge Analytica.