He is deliberately pushing the boundaries to see where they are and what courts will allow. He went back on an order last week because it was clearly illegal.
I think he will get there eventually. He has some control over USAID already and both houses of congress are under Republican control. House foreign affairs and Senate Foreign relations committees are working with Trump to pursue reorganization of USAID.
Aid will align with US interests so Somalia trying to switch it up apparently and appear like a US ally.