If the right wing candidate is a far right fascist, you prevent it moving to far right fascist. Shut that down and then next time they won’t run a far right fascist and guess what the Overton window moves left.
Case in point: they are running a far right fascist again because they think he can win. If he was shut down the first time, the Overton window would have moved left.
When the most left leaning candidate is right leaning I moves the overton window right
If the right wing candidate is a far right fascist, you prevent it moving to far right fascist. Shut that down and then next time they won’t run a far right fascist and guess what the Overton window moves left.
Case in point: they are running a far right fascist again because they think he can win. If he was shut down the first time, the Overton window would have moved left.