Is Gallup described as left-leaning?
Jumped out at me as well. Never seen anything like that applied to Quinnipiac et al.
The MSM wasn’t describing Rasmussen as “right leaning” when it was showing larger leads for Clinton (12 points after the Democratic Convention) than many of the other polls. Now that Rasmussen has picked up on the Trump surge they can be dismissed by the MSM as a fringe poll.