With lefties for the past 2 years I've found that just asking them to research news away from MSM and evaluate good versus evil is about 50% effective. They were already lefties. Instead of engaging in the political battle of their Mockingbird talking points and instead addressing "good and evil", then slowly trickling one bit of truth at a time.
In my mind getting half of them to walk away is not bad odds. And these were people I thought too ignorant to put their britches on straight. But once I got them searching for truth beyond the curtain of fake news turns out they had semi-functioning brains.
When you get a chance one day, can you post a reconstructed conversation you had with one of them? Or perhaps write it up as a vanity and ask for others to contribute their own similar anecdotes.
It helps to have a concrete example to serve as model to emulate.
What I do is take pot shots at the governing structure that I know they’ll agree with - like saying business will pick up. . . once we get the government boot off our necks.