The Tax Policy Center, which provides nonpartisan analysis of tax and budget policy, projected the bill would result next year in a $150 tax break for the lowest quintile of Americans, a $1,750 tax cut for the middle quintile, and a $10,950 tax cut for the top quintile. That’s compared to what they’d face if the 2017 tax cuts expired.

Party leaders insisted that they would not lump a jumble of unrelated policies into a single enormous piece of legislation and rush that bill through Congress before any reasonable person had time to read it.