Democrats paid PPP to skew this for them. Enough said.
Legitimately cannot tel if you're being serious
This poll was paid for by a pro-union group, it's not normal PPP. That makes it an internal poll, which is basically 100% guranteed to be at least slightly skewed toward what the client wants to see. If the client sees what they want, they are more likely to hire the pollster again, so the pollster skews the poll sample or doesn't push undecideds, or both, to satisfy the client.
No, just no.
Of course PPP or any other pollsters does not skew the polls, but there is always a "but"...
The real problem with such polls that it is [usually] up to client to publish the poll or not. And of course, the client is much more likely to let publish those polls that look good for him than those that don't. That's why those polls are more often outliers than
"regular" polls.
So it depends on pollsters policy.