commensalism:  an association between two organisms in which one benefits and the other derives neither benefit nor harm. This is the relationship between the government, which is the set of rules/laws and the law makers, and the legal citizens and illegals.

mutualism:   the doctrine that mutual dependence is necessary to social well-being. Republican theoretical style government by preferred free choice method

parasite:  an organism that lives in or on an organism of another species (its host) and benefits by deriving nutrients at the other's expense. Democrat type subjugation, overwhelming influence and financial administration of the breeding process.