Either way, Gotham is in a Democratic stronghold.
Who knows, maybe it's another reason why Batman refuses to use guns to fight crime. Maryland and Delaware are both states where gun laws are severe.
Considering how urban decay is a prevalent trope for Gotham, sounds about right. Would Gotham be more likely to vote for Trump than your average Republican?
The Gotham metro area I feel probably would. Wealthy suburbanites in a range of high-level professional positions terrified of violence spilling over into the 'burbs? Would've only been a Democrats starting in the 1990's.
I know little about Metropolis except that it seems brighter and nicer. I could imagine an inoffensive liberal Republican ending up in charge every once in a while--John Lindsay, Charlie Baker, Larry Hogan, etc.