The offices of Cambridge Analytica (CA) in central London, after it was announced that Britain's information commissioner Elizabeth Denham is pursuing a warrant to search Cambridge Analytica's computer servers, Tuesday March 20, 2018. Denham said Tuesday that she is using all her legal powers to investigate Facebook and political campaign consultants Cambridge Analytica over the alleged misuse of millions of people's data. Cambridge Analytica said it is committed to helping the U.K. investigation. (Kirsty O'Connor/PA via AP)
The offices of Cambridge Analytica (CA) in central London, after it was announced that Britain's information commissioner Elizabeth Denham is pursuing a warrant to search Cambridge Analytica's computer servers, Tuesday March 20, 2018. Denham said Tuesday that she is using all her legal powers to investigate Facebook and political campaign consultants Cambridge Analytica over the alleged misuse of millions of people's data. Cambridge Analytica said it is committed to helping the U.K. investigation. (Kirsty O'Connor/PA via AP) Credit: Kirsty O'Connor

LONDON — The head of Trump-affiliated data-mining firm Cambridge Analytica has been suspended, while government authorities are bearing down on both the firm and Facebook over allegations the firm stole data from 50 million Facebook users to manipulate elections.

Cambridge’s board of directors suspended CEO Alexander Nix pending an investigation after Nix boasted of various unsavory services to an undercover reporter for Britain’s Channel 4 News.

Channel 4 News broadcast clips Tuesday that also show Nix saying his data-mining firm played a major role in securing Donald Trump’s victory in the 2016 presidential elections.

Nix said the firm handled “all the data, all the analytics, all the targeting” and said Cambridge used emails with a “self-destruct timer” to make its role more difficult to trace.

“There’s no evidence, there’s no paper trail, there’s nothing,” he said.

In a statement, Cambridge’s board said Nix’s comments “do not represent the values or operations of the firm and his suspension reflects the seriousness with which we view this violation.”

Cambridge has denied wrongdoing, and Trump’s campaign has said it didn’t use Cambridge’s data.

Facebook also drew continued criticism for its alleged inaction to protect users’ privacy. Earlier Tuesday, the chairman of the U.K. parliamentary media committee, Damian Collins, said his group has asked Facebook how it uses data. He said Facebook officials “have been misleading to the committee.”

The committee summoned Facebook CEO Mark Zuckerberg to testify.

“It is now time to hear from a senior Facebook executive with the sufficient authority to give an accurate account of this catastrophic failure of process.”

Leading Democrats in the U.S. Senate also called on Zuckerberg to testify. Sen. Dianne Feinstein of California, the top Democrat on the Senate Judiciary Committee, called Facebook’s latest privacy scandal a “danger signal.” She wants Zuckerberg’s assurances that Facebook is prepared to take the lead on security measures that protect people’s privacy — or Congress may step in.

Facebook sidestepped questions on whether Zuckerberg would appear, saying instead that it’s currently focused on conducting its own reviews.

The request to appear comes as Britain’s information commissioner said she was using all her legal powers to investigate the social-media giant and Cambridge Analytica.

Commissioner Elizabeth Denham is pursuing a warrant to search Cambridge Analytica’s servers. She has also asked Facebook to cease its own audit of Cambridge Analytica’s data use. “Our advice to Facebook is to back away and let us go in and do our work,” she said.