The Marian Doctrines (White vs Fastigi)

Is Mary the intercessor between Jesus and men by virtue of being the 'Mother of God,' or simply another sinner saved by grace? James White debates Robert Fastigi a scholar and professor of theology at St. Edward's University, a Catholic University. How should we view Mary? As the intercessor between Jesus and men by virtue of being the Mother of God, or as simply another sinner saved by grace who had the privilege of carrying the incarnate God/Man Jesus Christ who is our only mediator and intercessor? Once again, the difference hinges on where one looks for authority: God's Word alone as infallible and sufficient, or to fallible men sitting on self-made Papal thrones.