Commentary on disclosed facts (ie, talking about something someone else publicly said) cannot be defamation. So if some rando on the Internet says "I've found a bunch of clips and news articles that I've selectively edited and misinterpreted to imply that Josh Shapiro is helping CHOP mutilate kids," and then Doug Mastriano says, "people are saying Josh Shapiro helps CHOP mutilate kids, that's why he shouldn't be governor," that is not defamation.