I recently saw a bumper sticker advocating a certain candidate. The tagline was: "Make Liberals Cry Again."
To me, this seems very telling - the argument for your candidate is to cause tens of millions of people to suffer.
I don't want anyone* to suffer. I want everyone to have a secure income and not have to worry about healthcare. I want everyone to feel safe in public and to be able to marry whoever they want. I want everyone and their kids to have access to quality education that gives them access to many opportunities in life.
I find those policies more compelling than hating about half the country.
*OK, I can think of a few exceptions.