Richard Baris of Peoples Pundit is one of the good guys and he cant get red voters to respond. Listen to him bemoan the response rate starting at about 30m 45s =>
https://www.youtube.com/watch?v=ZdSy3Ele764I
I heard that the other day. Actually felt bad for him. Baris is legit trying to do a good job, but cant due to non response rates.
Only pollster I feel bad for. The rest can get bent.