I'd argue the cracks really formed in the Bush era, but began to rise during the Obama era, and skyrocketed in the Trump era (Though I am a Millennial, so perhaps that biases my recollection of timeline).

What's interesting is each reader of the above comment will take something different away from it, based upon their political alignment.

What is interesting is that society hangs on by a thinner thread than we imagine. Chaos lurks just beyond a corner. Preventing it is much easier when in union.