My cousin’s husband designed an experiment that got written up in the Washington Post. Using a whack-a-mole game with celebrities, dictators and American politicians he demonstrated the virulent ill will of Democrats and Republicans toward each other’s leaders. When they played the game with half Republican and half Democrat politicians they were so intent on whacking the opposition that they got low scores.
Independents did better because they didn’t play favorites and were equal opportunity whackers. There was more to the study but my blog is quite
content with this synopsis.