Well as long as he declares that it's an "official act" he is certainly able to do that perfectly legally.
Given that the precedent is that the president can arbitrarily decide that the country is in a permanent state of national emergency and suspend the constitution indefinitely (which is literally what happened with the tariffs) that seems quite reasonable.
Given that the precedent is that the president can arbitrarily decide that the country is in a permanent state of national emergency and suspend the constitution indefinitely (which is literally what happened with the tariffs) that seems quite reasonable.