I understand what you’re saying and I think the problem really is the size and scope of the federal government. 

You can observe that a New York democrat is actually different than a Kentucky democrat, especially on the local level. 

I feel the problem is partially because we focus on a body of government to represent 320 million people in a single party ideology.

State, county, and city politics are different even though you will have some overlap and some of the concession voting. 

I could be wrong in some aspects though I maintain that if you look more locally it’s a little less party line.