It's loosely based off of the Holy Trinity of Christianity/Catholic beliefs. That God is Three Entities that handle different aspects of God stuff. God the Father - the law. God the Spirit - compassion. God the Son - the bridge between humanity and God.
I figure if it works for a religious ideology - it could be applied to the most powerful position in the US.
Republican Side of President - Law & Order. Democrat Side of President - Compassion and Social Programs. Third Party - the bridge between both Rep and Dem. All have to work together - for the betterment of the people. Nothing could ever be marked as Partisan again - because all view points would be considered before any decisions are made. Ergo - for example, an Executive Order would never be one sided.