One more point, with 77% of Americans (yes I know. I said Americans) saying that they would not tell a stranger they are backing Trump this makes this survey as suspect as the others.
Focus groups are un-assuming and they start off pretty easy so that you are comfortable. They ask several questions that lead up to the big question.
I was involved in one in Bellevue, Washington in the late 90’s that dealt with removing the Snake River dams to “restore” the steelhead runs and was the only conservative in the group.This was group was hired out of the Colorado State University to host these type of groups and they actually paid us $100 for our time.
All the lead up questions were designed to get you to agree with the basis for the poll, that in the end this will be a great thing, plus the $100 incentive they paid was a psychological tactic to ingratiate you to them. They paint a rosey picture of the future outcome. In my case though they left out the economic impact, so at the end they went around the table and the the first guy said yes he would support $/month on his power bill to pay for the restoration of the steelhead. I was next and agreed that it al sounded great and then went point by point with reason and logic. THe next 10 people admitted that they would have supported it but after my argument they changed their mind. Even the first guy that spoke then changed his mind.