What happens if Trump and Chief Justice Roberts do this to steal the election?

We won’t do anything but watch it unfold on TV.

Consider what is or was our self image as American citizens:

The great melting pot that welcomes all the intellects of the world
The great liberator that promotes democracy, freedom and trade throughout the world
The good guys who strike only when attacked and always play fair
The world leader in education, science and technology
The leader of world cooperation - NATO, Paris, Iran
The most powerful nation on earth
One nation, with liberty and justice for all

The reality:

We can’t afford to build the Super-Collider, but Switzerland can. Russia carries our astronauts into space and lands them in Kazakhstan. We rank 27th in the world in education. We have been defeated in all wars since 1945. We almost were defeated by a local police force in Grenada. We are scapegoating Mexicans and holding them in concentration camps. Jack booted federal troops are entering our cities against the will of the local people and authorities to incite riots. Police are murdering citizens during encounters over minor civil infractions.

We have watched these events unfold on nightly TV. They have simply become the norm. Used to be we didn’t torture, or invade, or stuff like that. Now we just watch it on TV.

Our incompetent President has mismanaged a pandemic so well that we now have 4,000,000 cases and 150,000 deaths. He is an international joke. Our system does not provide a cure. We cannot force a vote of no-confidence with a general strike. We can only watch it on TV.

Oh yeah, and we can keep score on how closely it tracks what happened in Germany.