The neo-confederates that hang onto their flag in the south are an example of American tribalism.
You really don't understand us do you. We are 100% American, we put Americans into space, we refine the Gas that Americans ride to work using, and we answer the call of our Nation in far greater numbers than any other geographic area. That flag is not tribal, but a statement in contrast to the dbm and their forced interpretation of it.
American Tribalism was cemented with the destruction of the Twin Towers on 9/11. You are either with us, or against us... an American, or an anti-American... that's my only "tribe"! That's my only creed!
I think they are more into the 10th amendment, actually.