IIRC, the ACA that became law originated in the Senate.
That silly old dusty Constitution thingy is pretty clear that taxes and other revenue bill must start in the HR.
I've never seen an explanation of this.
It’s not explainable. The whole mess is entirely irrational and unsupportable.
Interesting to note that our Founding Fathers planned on the Judicial to be the *weakest* of the three branches rather than co equal.
The law is whatever they say it is.
The Truth is whatever they say it is.
You owe what ever they say you owe.