We tend to argue back against lies: it is absurd to think that Democrats cheated in Republican-run Arizona and Georgia. Arguing back on social media often just drives attention to an issue, making it clear what the sides are.
Encourage Talk Beyond Talking-Points
Most of us, on all sides of politics, have our quick talking points. Competent political parties prep their base. Often this means that when we set out to have a conversation, we just blast quick talking points at each other. If you switch from blasting your points, and just keep on being interested, and encouraging someone to keep talking, they will soon run to the end of their talking points. People like being heard, so many will keep going: you listening creates space for people to develop their own opinions, perhaps find their heart when they have been encouraged to be cold. (This is another variant of active listening specific for politics.)