That's for sure. Remember the "Solid South?" All conservative Democrats, still mad at the Republicans for reconstruction, 100 years later.
And there were very prominent liberal Republicans, like the Rockefellers and Mayor Lindsay of NYC.
Actually, here is a true story about grudge holding. I lived in Thailand for a few months. I was shopping with a Thai friend, and we ran across a begger woman. She was from Burma. My friend treated her with utter contempt. Then she looks at me and says, "They invaded us."
I asked, when was that?
In 800 AD. The way she was carrying on, I thought it happened yesterday.