The more I think about it, the more certain I am that this tax cut idea could well be the most stupid thing this administration does. You can talk supply side economics and Laffer curves until you're blue in the face but timing is everything. First of all the oft mentioned Reagan tax cuts worked for a specific reason. And by "worked" I mean seemed to result in higher fiscal revenue. If you cut taxes when the economy has been crushed by 15+% interest rates at the same time as the Fed starts aggressively cutting, you'll get higher economic activity and thus higher fiscal revenues, but don't assume the better fiscal position is due to the tax cuts. It's the interest rates of course! But Republicans have been able to use that happy coincidence to peddle a lie for a generation. No one talks about the experiment not working in Kentucky in recent years for example, but that's exactly what they tried.
Anyway, the reason I believe this is going to be a disaster, is that unlike in the early 80s, you have an economy which for all intents and purposes is close to full employment (yes yes, some might say that there is a massively under utilised labour force, but you need to fit the skills to the job, and corporates are screaming that there's a skills shortage), and now you want to cut taxes? Economics 101, if you stimulate an already strong economy you'll force the Fed to hike rates even more aggressively which will slow the economy down and cause fiscal revenues to drop. Anyone in the GOP claiming that a tax cut right here and now is what the US economy needs is lying or stupid.
As a never Trumper, I actually wouldn't mind if they do this though. It'll guarantee that Trump loses in 2020, because by then the Fed would have killed the economy and the stock market will be far far lower. We can talk about Dems and Reps, but at the end of the day what really matters is the economy. Even the Donald won't be able to suck enough Russian cock to win that election