I trust Trump about as far as I can throw him, and at the end of the day it's really the Pentagon calling the shots here not the POTUS.
But dudes clearly speaking to a public sentiment here.
There'd really be not point unless the PSL was strong enough to form its own institutions and armed groups to combat any coup attempts.
If the PSL candidate won by some miraculous fluke, like a bunch of people protest voting or something, they probably wouldn't even need to wait to get JFKed, the Supreme Court could probably just pull some bullshit out their ass to nullify their victory.