1: "Supposedly" because the polls I just looked up seemed to be nearly identical for Sanders or Clinton vs Trump, with Democrats at ~50% and Trump at ~38%.
http://www.realclearpolitics.com/epolls/2016/president/us/ge...
spread is an average of clinton +10% vs sanders at +16%
http://projects.fivethirtyeight.com/facebook-primary/
I'd usually ignore Facebook likes, and FiveThirtyEight insists it's for fun as well. However, their throwaway comment "If Facebook likes were votes... Donald Trump [would] garner more support than Ted Cruz and Marco Rubio combined" has actually proven to be accurate.
Trump: 48% Delegates, 53% Republican Likes
Cruz: 32% Delegates, 28% Republican Likes
Rubio: 11% Delegates, 16% Republican Likes
Kasich: 9% Delegates, 3% Republican Likes
Though if you add Carson back in, it stops matching up. And certainly the Facebook Like counts don't match delegate counts on the Democrat side. But I thought it was odd how closely the Facebook figures were matching for the Republicans.