“Does Trump think dubbing the former Gov of SC “Birdbrain”...”
There’s a concept called “social proof”.
People want to be associated with winners; with people that others talk about positively. This is why ridicule is such a powerful tool.
This is why GSR (guilt, shame, and reputation attacks) are so commonly used by the left. The want to make association with a person a negative.
Trump doesn’t have it down as well as the left, but he does a better job of using the tool than most on the right (which is not at all).
GSR is very effective in moving women’s votes.