Editing to clarify: this is not a hypothetical. This is something that I've been trying to do previously and am interested in doing a better job at in the future.
I want to run on this topic, and election/democratic reform so we can cut to the nib of it, but it's rough when I'm in a blue/gerrymandered district in a red state. Would want to challenge an actual red incumbent.
Remember that pretty much only political junkies vote in the primaries. You need to identify those groups and target them hard. Don't worry about the general public, they are not paying attention.