The Legislative Branch of government has the power to establish Post Offices. Congress makes up the Legislative Branch and include both the House of Representatives and the Senate.
executive
it is the Executive Branch
The executive branch establishes post offices and builds roads.
legislative
Legislative branch
METHODMANS
Post offices are funded by taxes. You pay taxes, the government takes that money and pays for post offices.
the federal
federal
The Government.
federal
Post Offices
Because it is a Federal holiday, US Government offices, local and state offices, post offices, courts, etc.