Indeed there is, however you gave 0 analysis as to what "manipulation" went on in this particular poll. You just looked at it and immediately dismissed it because it happened to fall in line with the same standard method of the vast majority of scientific polls out there. You would perhaps have a point if you actually looked at it and found a way that it manipulated the sample...like showing a really large standard deviation, or pointing out some kind of specific flaw within how they gathered their sample, or a question that was highly ambiguous, etc. Instead you just went “OMG! They used less people then there are people in this country, ITS NOT GOOD!”
All that really showed, to be truthful, is that you weren’t honestly looking for any kind of proof because you knew before hand that there was no proof that you were going to accept. You can’t honestly record and recite the education level of every single person in the United States, and you were going to lambast any poll you didn’t like the results of as being manipulated, so there was no honest actual interest in getting “proof”, you just wanted to attack her and bash her point simply because it was HER point, not because of any factual truth or error regarding it, and that just gave you a cover. It was additionally apparent since you had no issue patting the very next poll on the back, even though it had similar issues as what you suggested was wrong with the first.