Anarchism

You do what you would do anyway: organize, build community, build dual power, undermine the state. Any specific politician doesn't matter. The right will pull the rug out from under people, they'll do whatever evil thing they're gonna do, but the left will set up the rug in the first place and give people a false sense of hope.

Authoritarianism is bad at disasters. The more autocraric, the worse they are at responding to dynamic environments. Build mutual aid networks, support people targeted by the state, prepare (collectively) for the collapse or withdrawal of the state.

It never mattered which puppet is pulling the levers, or how authoritarian or not a society is, the assignment has always been the same. If you don't have the groundwork of dual power, any more radical action is just asthetic.

Edit: IMHO, the two most important things to organize around are anti-police terror and disaster preparedness. Authoritarianism is only tenable if the community believes that having the police is better than abolishing them. In times of crisis the state withdrawals. If people can provide for their own needs, they see proof that the state is unnecessary. Make the state unnecessary, there will be a crisis.