The issue is more: will it matter at all?
Genuinely serious. Jackson is Trump's favorite President for a reason: he exposed that under a determined enough man with enough popular support behind him, neither Congress nor the SCOTUS can actually do anything about a President acting in contravention of a court order. If the SCOTUS says "this bill is unconstitutional", will it stop anyone from actually acting like it's in force?
Nah, he's not that kind of dictator. He doesn't need to feel like he's in the military - he needs to feel like he's above them, on top of them as it were. The big military parade isn't for him to feel like a general - it's so he can copy his authoritarian friends without actually having the military cred himself to back it up. It's cargo cult dictatorship.