They can't. It's been obvious from the start that both parties agreed at the beginning of this Administration that "The Historic First Black President" cannot be corrupt, conniving, or dumb. "The Historic First Black President" cannot be anything but brave, bold, smart, and inspiring. His wife, too, and the kids.
Obama has been untouchable because both parties think his symbolism is untouchable. What would happen if "The Historic First Black President" was an amoral crook? Why then, generations of little black children would be disappointed and disenchanted.
Looking at things that way explains almost everything that's gone on in the last eight years.
I hope a real conservative gets elected to the Nevada Senate seat currently held by Dingy Dirty Harry.
And the symbolism of the first black president will be renewed in 2017 for the first female president. Nothing I see can stop it.