What was the impact of facebook and the nature and intensity of fake news four years ago vs now? If the difference is even slightly significant, it could well e

What was the impact of facebook and the nature and intensity of fake news four years ago vs now? If the difference is even slightly significant, it could well explain part of the phenomenon. And one does need to explain why such large percentage of Trump's supporters believe things like Obama being foreign a born muslim, and why they voted so conclusively against their own self interests