It seems to me that we've abandoned leadership and consensus as political goals. There's no sense that we're one nation. Fear-mongering partisans have demonized their opponents so successfully that each side is consumed with fear and paranoia. In that state of mind, people will believe anything, do anything, to "fight" the other side.
Our elections are no longer about electing a leader. They've become proxy civil wars, between the Democrats and Republican, a power struggle over government that has become too powerful.
I don't see it changing until we change the voting system to strip the partisans of the key source of their power - the lesser of two evils con game. Ranked choice voting does that, and I think it would, in time, un-divide us. But it may be too late.