That narrative works because Democrat policies fail, and it is easy to point to example after example of their failure. OTOH, where do you point to say that Democrat policies succeed? The only place I can think of is Maryland (the state with the highest median income), but MD is a special case. It's where many of the government workers live, so is insulated from the consequences of liberal policies.
“It’s where many of the government workers live, so is insulated from the consequences of liberal policies.”
I beg to differ; it is FUNDED BY liberal policies. Those government workers are simply drawing incomes from 49 other states and spending it in Maryland.