A unitary government is described as a centralized government where all powers belong to a single, central agency. Any administrative divisions exercise only powers that the central government chooses to delegate. Great Britain is a good example.
It is the "taking" of something of value, therefore it is a criminal offense. Also, tehcnically, the passpost does not "belong" to the person to whom it is issued, its ownership remains with the government that issued it - therefore "Theft of a Government Document."
He favored a small central government. He believed in the Constitution which says that all powers not explicitly given to the federal government belong to the states. He did , however, believe that the union was undisolvable -- that states could never secede .
The government does not belong to a branch, it has branches. The government is divided into three branches: the legislative, executive, and judicial. They all have different functions in terms of the law.