Bolton's political action committee, the John Bolton Super PAC, hired the data consultancy in 2014, not long after the firm was founded. His super PAC spent about $1.2 million in two years on services like "behavioral microtargeting with psychographic messaging," reportedly built off harvested data from Facebook users.
The White House didn't immediately respond to a request for comment.
Cambridge Analyticato the data of millions of Facebook users and used it to create targeted ads on topics like the UK's Brexit referendum campaign, as well as for Donald Trump's 2016 presidential campaign.
A US House committee is nowto testify about the social network's role in the matter.