@JimWooten I would be curious on what you find out! I work pretty frequently with groups that are doing research or study that is political science related (I myself also have a background in both political science and GIS). I work in IT at a college currently as an academic/instructional technologist that supports GIS coursework
I will also agree with you that's it's been really difficult to find texts on this type of topic - especially ones that are more based in the humanities side and not just statistical analysis. Not that analyzing voting doesn't involve stats, but in my experience - the stats texts focus only on the numbers part and validating if things are right/wrong/significant but doesn't always tie back to how this relates to the population from a sociopolitical perspective.
If you have research librarians at your institution, I definitely recommend reaching out to them! I work with research librarians frequently on trying to find materials. They might have some recommendations of other resources to check!