Mark Zuckerberg is facing his second round of testimony Wednesday on Capitol Hill, this time before a House of Representatives panel.

Zuckerbergs appearance before the House Energy and Commerce Committee will focus on how Facebook handled the Cambridge Analytica scandal and what the Silicon Valley behemoth is doing to fix the problem.

The British-based political consultancy, which worked for the Donald Trump Presidential Campaign, improperly obtained the data of as many as 87 million Facebook users in a bid to influence political elections.

“We didn’t take a broad enough view of our responsibility, and that was a big mistake,” Zuckerberg plans to tell members of the House panels on Wednesday.

“It was my mistake and I’m sorry. I started Facebook. I run it and I’m responsible for what happens here.”

The appearance comes less than 24 hours after the Facebook CEO was grilled for nearly five hours by 44 senators from the Judiciary and Commerce committees, who attacked the social media giants inability to protect users data and for failing to stop Russias use of the site as means to interfere in the 2016 presidential election.

The 33-year-old tech big-wig, poised and stone-faced on Tuesday, also repeatedly apologized for Facebooks role in the data-mining scandal, adding the company is reviewing the improper access third-party apps may have to data on the social network site.