It's true the independents usually provide the difference, but the problems with the Democrats lately is their base is becoming disenfranchised and apathetic. If they do not fix this, then it is entirely possible that no amount of independents will do any good.
Even if the open windows of science at first make us shiver after the cozy indoor warmth of traditional humanizing myths, in the end the fresh air brings vigor, and the great spaces have a splendor of their own - Bertrand Russell