Polling suggests a shift in American public opinion, especially among Democrats, that could potentially redefine the alliance between the United States and Israel. — Picture a seasoned married couple: they’ve got the rhythm of each other’s habits, a shared calendar of memories, and they finish each other’s sentences. Yet, what if in this seemingly perfect relationship, one begins to feel sidelined, taken for granted, maybe even unheard? And the other, wrapped in the comfort…