The term 'Ruling Party' refers to the political party that is in power and has the authority to make decisions and laws. The crossword solutions for this term are 'ARBITER' (7 letters) and 'INS' (3 letters). 'ARBITER' is a person who has the authority to make a decision or judgement, while 'INS' stands for Immigration and Naturalization Service, which is a government agency responsible for enforcing immigration laws.