[P-Marlowe]

Cheating.

That and the fact that a large percentage of Trump supporters will never talk to a stranger on the phone. I won’t. I got a call from a pollster yesterday. I hung up immediately. I’m sure they counted me as a Hillary supporter.

[Genoa]

Right. (1) A lot of Trump supporters don't cooperate with pollsters because they despise them. (2) A lot of people are planning to vote for Trump but won't discuss it because of the intense social pressure from Trump-haters. The polls don't reflect either one of these scenarios.