[cutemonster]

He likes flattery too, and this helps him get more of that.

Although I don't think that's the direct reason. But feeling powerful by using his power maybe can be a direct reason for this behavior?

[ZeroGravitas]

Yes, he gets full power to do this without Congress meddling as long as there is an emergency. Or he lies, in an inconsistent and unconvincing manner, about there being an emergency and everyone just accepts it.