Idk. For me, if I had 20 friends, and 12 agreed to do something, I wouldn’t say they “overwhelmingly agree”. I’d just say a majority. But politics is on a much bigger scale.
Your friends are more likely to agree with you (and each other) on things because that's one of the reasons you're friends. I can think of very few things, other than the basics like "murder is bad", that 58% of the general public agrees on.