Andrew Jackson showed his support for states’ rights by winning the election to become president.
defeating the British in the War of 1812.
insisting that the Cherokee remain in Georgia.
refusing to enforce the Worcester v. Georgia decision.

An informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.