In last post, Jesus was understood as the "legislative branch" as he fulfilled the law, by doing the law. But, Jesus was also representative of the judicial branch as he interpreted the law against the Jewish religious leaders. He never denied being a Jew, as he even preached in the synagogue. He did not come to set up a "new religion or religious order". Jesus was a universalizer of the law in understanding the full intent and meaning of the law.
Not only was he the prophet and priest, but also, the King. He was understood to be God. The executive branch, the President, is not King, as his position is balance by the "others". Balance of power brings true humility as it understands its dependence on the "other" branch. In this sense, there is no sovereignty. Only the law in its defense of the Constitution (the President), it interpretation (the judiary) and its legislation and representation (Congress). Our form of government, in this sense, is the most "", philosophically.
As to sovereignty, this form of government protects individual rights, as this government believes in the universal of the individual, as equal before the law. Justice defends and protects the indivdual's right to life, liberty and the pursuit of happiness. So, while Law is upheld by our government, sovereignty is understood in individual terms.