Are they a reputed Pollster
PPP? They're a great pollster. Of the major national pollsters, they have almost no statistical bias. This poll is probably a couple of points more Democratic than it should be because it was done for a liberal advocacy group but PPP is solid.
Additionally, they didn't ask any of their funny questions that troll Republican voters. They just took a regular sample
Oops I misread. I thought End Citizens United was the pollster.
PPP are a great pollster of course
Eh, they are robo calls mixed with Internet samples. Typically low balls HRC, esp with POC. Has had a Trump lean all cycle.