Re: New Frontiers
The whole of the US Space Force existed before Trump as separate units in different military branches. The idea of unifying them had been proposed and investigated before. The idea was rejected because it had no strong benefits and would create a new bureaucracy doing the same things that were already done by the existing branches of the military thus reducing economies of scale.
I do not know who put the idea into Trump's head but once he came out with it the Air Force were first off the mark to get it done. I think the idea was a surprise to the Trump administration and none of them had considered how to profit from it but given time they would have. To prevent that, the Air Force put the plan they had already studied on the table and steered the project that way. The steering was not that hard as the administration in general and Trump in particular did not have a clue about how to merge the various units into a single entity.
Well done to the US Air Force for capturing a Trump Tweet and pinning it to the ground before it became a dumpster fire.