I assume you mean the Republicans' tax bill... to call it, or any other bill, Trump's, it would help if the man didn't contradict himself and his party on a daily basis.
Repatriating cash is obviously a direct consequence of the tax bill, but as for the rest, do you seriously think investment decisions on that scale are taken within a few weeks, since the passage of the bill?
Obama wasnt great about these kinds of things too. But I think now that everything is recorded we just see this kind of thing more often. Perhaps previous presidents said similar things often enough. Perhaps not.
Either way, I get the impression Trump has few actual beliefs other than Trumpism.