Arab leaders seemed less than impressed with President Obama’s pledge of an “ironclad commitment to the security of our Gulf partners.”

Understandable: They’ve already seen many other of his other ironclad commitments — especially in the Middle East — fall by the wayside.

Indeed, Obama’s vow — which wasn’t even all it was cracked up to be by the White House spin team — came amid mounting evidence that Syria’s Bashar al-Assad is actively using chlorine gas against his own people, killing tens of thousands.

Chemical weapons, recall, were the target of the “red line” Obama drew back in 2012 against Assad. Deployment of deadly outlawed weapons, he said then, “would change my calculus” and ensure “enormous consequences” for the Syrian regime.

Now the president argues that chlorine “historically hasn’t been listed as a chemical weapon.”

In fact, it’s the original one, dating back to Germany’s use of it in World War I.

And now, as Assad continues to use it with impunity, the White House reportedly is still debating how to respond.

As the Gulf state leaders know, this has significant ramifications for the deal Obama is trying desperately to reach with Iran — which, by all accounts, would make a mockery of the president’s 2008 commitment to do “whatever it takes” to keep Iran from crossing the nuclear threshhold.

In his 2010 State of the Union, Obama issued a “promise” that Iran would face “growing consequences” for its pursuit of nuclear weapons. Instead, Washington is now allying with Iran to counter ISIS.

Meanwhile, the situation in Yemen continues to deteriorate. And in Iraq, ISIS has seized control of the key area of Ramadi.

All of which is why Saudi leaders now vow publicly they’re not putting their faith in Obama’s “ironclad commitments” but will match Iran nuke for nuke.

The more Obama guarantees America’s traditional allies, the more the Middle East rapidly spirals into total chaos.