Anyway, Trump's theme was more restorational than reactionary: restoring America to its "rightful place" in the world.
That is literally the definition of what it means to be reactionary.
I suppose one could argue that Trump is reactionary only in certain regards, but you'd hard pressed to find anyone who truly is a perfect reactionary, so quibbling in that way would be an attempt to render the term "reactionary" meaningless.
But if you take that definition as written, then virtually everyone is a reactionary in some way. For example, if the Wisconsin Democrats want to repeal Act 10 (the collective bargaining act) does that make them reactionary? They want to restore the status quo ante.
Being reactionary isn't exclusively a right-wing phenomenon, tho it most often is found on the right.
(Incidentally, Wisconsin Act10 was horrible legislation if you are conservative. Even if you think that some public employees shouldn't be able to engage in collective bargaining, the ones that Act 10 exempted from the ban, public safety officers, are the ones that traditionally it was considered most necessary to not allow to engage in labor actions. Act 10 was raw political sausage at its wurst.)