Here's Obama's 2012 campaign manager discussing this. They did it different four years later, and Facebook had four more years of data and tens of millions mor

Here's Obama's 2012 campaign manager discussing this. They did it different four years later, and Facebook had four more years of data and tens of millions more users at that point. https://www.youtube.com/watch?v=mZmcyHpG31A https://www.youtube.com/watch?v=mZmcyHpG31A