I agree that revenues almost certainly would have been higher without the cuts, but still pretty amazing that it seemed to only pull one year of growth from trend.
To be honest, I would have expected a much bigger decline
I understand where you're coming from, but $276bn is a pretty substantial amount of money though! I think it's also worth noting that this outcome (revenue would increase due to expected economic growth, but would end up lower than in the no-tax-cuts scenario) was correctly predicted by most of the organizations that studied the impact of the legislation.
To be honest, I would have expected a much bigger decline