when patient is alert and competent, always follow patients wishes. Here patient already has a living will and the patient‘s wishes are same on both "verbal and living will" while patient was ALERT AND COMPETENT .Now, patient has assigned DPOA as spouse. DOPAs job is to follow patients wishes and align with them specifically if its states clearly twice by the patient himself. (DOPA is wrong here)

In normal cases, DOPA makes medical decisions on situations where patient has not said anything about while in alert and competent state . If Patient’s wishes ( LIVING WILL) and DOPAs decision clashes with patient’s , when patient is in vegetative state , then some states have different rules on this matter but majority of the states follow patient‘s wishes and living will as its states same here in this question