No, I do not think its an organized effort, nor do I think that people are scared, but it is human nature to not to admit to things that are highly embarrassing/unpopular. The 40% is the group of morons, racists and other human garbage who is proud of being the shitbags that they are. I believe that there is a significant portion of people who will answer a poll - whether anonymous or otherwise by saying they "disapprove of" or "will not for Trump again," but when it comes down to pulling the lever, we all know that they will vote R no matter what. Shit, there a bunch of those obvious liars right here on this board, and this is a pretty small cross section of people in relation to the voting populace.
Plus, what exactly has been done to address or combat the Russian interference that helped get Trump elected in the first place? Oh, exactly nothing? That's right. So I am just not seeing why anyone is expecting a different result this time.