Have you considered it was highly unlikely he would have waited until he was comatose before he made this impossible decision?
When the Protestants and Catholics were fighting one another in N. Ireland I heard an oft retold story about a Protestant leader saying he wanted to convert to Catholicism as he lay dying. Everyone was shocked and inquired why, why now of all times? He mumbled his last words that he would rather have a Catholic die than a Protestant.
Change it to Republican/Democrat or whatever suits the circumstance.