"We ran the Kenyatta campaign in 2013 and 2017".

Trump outlined his administration's plan to tackle the nation's opioid epidemic, which includes a proposal to execute some convicted drug dealers and considers "major litigation" against drug manufacturers.

It wasn't until 2015 that the feature was finally removed. And built models to exploit what we knew about them and target their inner demons. The firm had earlier assured they had deleted every bit of info it had though that does not seem to have been verified so far.

On Monday, Channel 4 News broadcasted hidden camera footage in which Cambridge Analytica chief executive Alexander Nix appears to suggest tactics the company should use to discredit politicians online.

Facebook is mired in a global political storm by data leak of 50 million of American users, allegedly leveraged by Cambridge Analytics consulting to sharpen with psychological profiles strategies of attraction of vote of Donald Trump campaign in 2016.

Facebook was already facing calls on Saturday for regulation from the US Congress after the reports in the New York Times and London's Observer over the weekend.

Are you very concerned that this episode could have a chilling effect on social networks' willingness to share data with researchers?

The data was harvested by an application developed by a British academic, Aleksandr Kogan, the newspapers said.

How was Cambridge Analytica involved with the Trump campaign?

Image Damien Collins' letter to Mark Zuckerberg

Cambridge Analytica did not respond to a request for comment before publication.

The firm "then used the test results and Facebook data to build an algorithm that could analyze individual Facebook profiles and determine personality traits linked to voting behaviour", according to the Observer's report. Meaning that Facebook could've had a bigger impact on the 2016's election than initially thought. Facebook admitted that an estimated 270,000 people had downloaded the app and shared their personal details with it.

Republican Senator of Arizona, Jeff Flake, specifically called out Zuckerberg, saying that he needs to take responsibility for the data misuse, and "stop hiding behind his Facebook page". Facebook, however, disputes this characterization. Data analysis was used heavily in deciding strategy even in India during the 2014 general elections, the subsequent Bihar assembly elections and even in the UP elections. "People knowingly provided their information, no systems were infiltrated, and no passwords or sensitive pieces of information were stolen or hacked". After all, the data was obtained legally through apps people signed into, explicitly stating their information can be used.

On Sunday a whistleblower called Christopher Wylie claimed most of this personal information had been taken without authorisation. Some might consider that social engineering attack.

In a Twitter post, Stamos confirmed that his "role did change", but that he's also still "fully engaged" with work at Facebook.

It has been its biggest fall since 2012 and analysts estimate that it has resulted in a loss of about 32 billion euros. The data reportedly ended up in Cambridge Analytica's hands to be used as part of its voter modelling.

Facebook shares closed more than 10% below their highest peak on February 1 and dropped below their 50-day and 100-day averages. there was information that social network's security was breached and a data firm that helped Donald Trump win the presidency had accessed and retained information on 50 million Facebook users without their permission.

Labour MP Ben Bradshaw told Shelagh Fogarty that this has "shaken Theresa May out of complacency".

"The fact the information commissioner has told the world she is going to court has given Cambridge Analytica and potentially others all sorts of head starts in disguising and hiding data and information and records that might be needed for the investigation".