Yes Trump has managed to mend some of the terrible foreign policy mistakes of Obama. This approach may not work in this case if there is definitive proof Iran is behind the Saudi attack? The attack if proven to originate from Iran is an act of War and Saudi Arabia not replying, receiving restitution from Iran or Iran punished will create a power shift and loss of support for Saudi Arabia. Basically a Iranian victory over the west.
Now I've heard over the years and am hearing today that if Iran moves from attacking via surrogates to directly it will lead to a regional war which will engulf the ME and the western powers who support alliances in the ME. Some only believe Iran would make such a move if they possess nuclear arms, overwhelming conventional means or protecting political alliance(s). If they have these they are keeping them secret.
Like I've presented in other post I hope that door hasn't opened we've been warned about opening.
Its hard to imagine Iran would directly attack Saudi Arabia and risk open war or the UN joining an alliance against them without a means which would ensure a victory.
But history shows us people always believe victory can be achieved.