How Trump could lose the election on every level and still remain president. If we see it start to play out like this, we'll know what he's doing.
Simpler than that
Trump is engineering a massive public health crisis as we speak, when the balloon goes up and the truth is allowed out, Trump declares a state of national emergency, cancels the election indefinitely and declares direct presidential rule until the crisis is over.
One way or the other he's going to try and stay past his expiration date like a carton of sour milk that's turned green and lumpy, orange and lumpy in his case.