Dems have the moral, ethical high ground? The real heart and soul of America? Big whoop. Who controls the gerrymander, controls the nation.
The biggest thing one has to do, IMHO, is remind folks that Democrats vote for your needs. Republicans promise a great game, and when the DC bell rings, they fall into line and vote like so many robots. I used to split the ticket for local issues, but never more. After 1996 or 2000, my vote-investment worked against my interests. Straight Dem from then on.