Clinton is whistling in the wind if she believes these policies can place any leverage on Syria and the Russians whilst she is unilaterally trying to conquer Raqqa.
She herself acknowledged in the third debate that the establishment of a no fly-zone:
… “would not be done just on the first day. This would take a lot of negotiation. And it would also take making it clear to the Russians and the Syrians that our purpose here was to provide safe zones on the ground.”
Presumably Syria would continue to burn whilst President Clinton negotiated with President Putin.
Trump has taken an entirely different tack:
Trump has taken an entirely different tack: