Is Mary a Uniquely Powerful Intercessor?

William Stone: Nobody's going to deny that Mary has a, you know, unique position in the heavenly court and that she is a uniquely powerful intercessor. The question is whether she has veto power over individual graces or if that's not the claim, what is the claim? And does God have to go to her and ask her leave before he gives it? William Stone: Is there some meaning in which we can say, well,  she didn't want this grace granted in this particular instance,. would God be bound by that decision?