Like reading my own thoughts
As an appropriate follow-up to the previous post, FiveThirtyEight published this short manifesto on Republicans' use of the word "Democrat" when "Democratic" is grammatically correct. Please read it; it's good.
This is an issue that's been tumbling around in my head for some time and, as usual, FiveThirtyEight expresses my own opinions better than I ever could. Damn you, Sean Quinn!
(As a technical aside, I think the genesis of the problem is that republican is both an adjective and a noun, while democrat is only a noun. The morphologies don't jive – so we force them. In the words of my German professor, "Das ist Unsinn.")