They became angry at perceived threats to their party…

[UtahFanSir]

Informative read: NYT Article By Amanda Taub

“That helps explain why Mr. Trump’s support among Republican voters remains quite high, even though the first few months of his presidency have been plagued by scandals and political setbacks, and even though his overall national approval ratings are now very low. He has been careful to recast every potential scandal and policy struggle as a battle against the Democrats and other outside groups.”

The article does a nice job of describing the sources of bipartisanship as tribal self-expression, among others.

Here is a second article also from the NYT, published in January: Are You Wedded to Your Party?

[zeous]

And why tribal democrats to this day overlook the heinous indedinite detention obama signed in ndaa 2012, overturning hundreds of years of habeus corpus tradition.

Yet he’s hailed as a civil rights champion. Sick.

This and the bs with trump are only possible with political tribalism.  People become blinded to right and wrong if they must defend their tribal preference.