Why did divisions in the republican party occur?
answer

Back then, the Republican party was divided into two big factions.
Those who Support the expansion of slavery into new territories
And those who opposed the expansion of Slavery into new territories

Carbon monoxide is usually more dangerous indoors.

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.