I noticed that Donald Trump's supporters were twice as high among non-college graduates than college graduates. Its right wing populism. Its blaming others for economic problems (immigrants, China, trade, outsourcing, etc.) that these supporters may be facing. Its saying whatever the hell you want without giving a sh**t. Its about attitude, not politics. That's what the appeal is, and its pretty clear it is working among 1/4 of the GOP electorate. Its stupid, but so are they.
To be fair, many of the college graduate GOP primary voters are supporting Carson. That's not much better.