Unless something drastic happens, this will be the week Republicans ram through a tax cut that adds more than a trillion dollars to federal debt while undermining health care for millions. They will do so by violating all previous norms for major legislation, having held not a single hearing and rushed to a vote before the new senator from Alabama could be seated.

The question is, why are they doing this? For this bill isn’t just a policy crime; it also seems to be a political mistake. It will, however, be good, one way or another, for the bank accounts of quite a few Republican members of Congress. Is that why it will pass?

About the politics: Normally, politicians willing to add a trillion dollars to the debt can hand out enough goodies to make their plans popular, at least for a while. The George W. Bush tax cuts heavily favored the rich over the middle class, but they contained enough clear middle-class tax cuts to have broad public approval, at least at first.

This bill, however, faces heavy disapproval. Ordinary voters may not be able to parse all the details, but they have figured out that this bill is a giveaway to corporations and the wealthy that will end up hurting most families. This negative view isn’t likely to change.