The leaves look wilted but I don't know if that is because the sample dried out or if the leaves were wilted lookintg like that on the plant.  If they were, I would suspect overwatering or sitting in saturated soils.  Does the sump pump drain near this plant?  Or is it in a spot where water was standing for a time?  There could also be other damage to roots from digging or mechanical damage by rodents or something else.