Again, as you accurately state and reiterate my position, he does not give specifics or even direct causation. I read, "I did stuff, and good things happened" which is NOT a statement of direct cause/effect. It's an implication of it for those who want that inference.
No, Trump specifically stated that "the regulations had as big an impact as these massive tax cuts that we’ve given". He specifically correlates regulations and tax cuts as both having a big impact on the economy.
He specifically says he is deregulating at some alarming rate. Or that he's done the most deregulating.
These are words. These are his claims. Those words and claims will always be scrutinized by others.
No, he subtracts deregulations he feels are not sufficient to meet his interpretation of Trump's claims. That's not the way facts work.
No, the author did not. The author accurately walks through the deregulations the White house itself said they accomplished. It's a list from the White House and the author walks through it finding that the WH said it took 57 deregulator actions. 11 of those 57 were actually issued by Obama; they just happened under Trump. 5 of the remaining 46 were simply proposed rules that were withdrawn. Not regulation. Of the remaining 41, 4 were closing out deregulation started by the Obama administration (The author then gives credit to the Trump administration for following through. The author concludes that they did reduce cost but that it's simply "disingenuous to include them in a total designed to give the impression of a change in direction in regulatory policy".
From there, of the 37 left the White House simply doesn't include their own numbers on cost savings. In 15 of those 37, the White House itself says the cost savings are negligible.
The author then points out that the White House was unable to point out cost savings for 21 deregulations actually undertaken by the Trump administration. The author then states that these 21 deregulations are important and should not be minimized. That being said, the author simply states that based on White House numbers, the cost savings are $1.6 billion "in an economy where the GDP is more than $20 trillion". My bad math says that's about 0.008% of GDP.
Do you believe the tax cuts only had a 0.008% effect on GDP?
Because he subtracts ones that he feels don't matter. If it was already in the works, that doesn't count (to the author). That's not the way facts work.