Trump overlooked one approach to winning and that is mailing flyers and TV ads. People in Iowa were inundated with Rubio’s flyers, and at least some people found them most effective.
I’d wager dreams got Rubio more votes than flyers.
Rubio’s support came from bankers & financial services execs, lawyers, and insurance execs. The Des Moines and Cedar Rapids metro areas abound with these types. They took their lead from the RNC, even ignoring establishment Governor Branstad’s pleas to support Christie.