It was never "viable".
He was forced on us. Shoehorned into a position of power by multi-billion dollar waves of propaganda that shoved his face into every household on every channel. Even the Democratic Party was helping "elevate" him to a "serious candidate" with their twisted Pied Piper Strategy.
Most Americans hate BOTH parties. We're conditioned to think this is who we are, these are our only options, this is the Overton Window and the "center" is somewhere between rabid fascism and limousine neoliberalism-- normalizing planetwrecking corporate feudalism and war profiteering across the board.
NONE OF THIS IS VIABLE.