Yes. Trump draws much of his support from Democrats.
And regarding your comment about “understatement of his support” - I added a link in Post #1 where Rush was talking about that yesterday.
A couple of more observations. I haven’t heard ANY person praising Hillary. I’ve heard many say that they would never vote for Hillary. I’ve seen one “Im Ready for Hillary” bumper sticker on one car while driving. Slightly surprising that a few of the younger, university-attending workers are saying they like Sanders.