1) Don't dismiss racism/xenophobia/nationalism as a motivating force for voters (at least GOP voters)
2) *Don't* be so dismissive of early polling leads (since Trump led in polls from July 2015 onwards)
4) Recognize that having disproportionate media attention is a hugely powerful advantage in a multi-candidate field
But people forget that Trump led in GOP polls wire-to-wire; the question is why people (including me) ignored that.