I read in Ras years ago, he admittedly asks more dems than Republicans when he is doing a poll (the way he weights is troubling) so Ras as a establishment guy would not surprise that he weights against Tea Party types.
Scott Rasmussen hasn't been a part of Rasmussen Reports since August 2013. He is now president or Styrk.com which he founded in 2014. This poll may have his name but these are not his results.