GAZETTE: What will be the determinative factor? Is it Trump’s behavior or the success of whoever is at the negotiating table or something else?

SHERMAN: There are multiple pieces here. Iran is not a good player here either. They have been attacking Americans. Interestingly, while the deal was fully in place, there were no rocket attacks by Iran. But since the president pulled out of the deal, those attacks and asymmetric actions of Iran have increased. The hardliners, or as I call them, the hard, hardliners, the Islamic Revolutionary Guard Corps and the Quds force that Qassim Suleimani headed up, have been in control of Iran’s foreign policy and military policy and so Iran has been part of this escalatory cycle, as well. But the killing of Qassim Suleimani has accelerated this spiral quite considerably and how Iran responds and then how Trump responds to that will determine whether there’s any path back to a negotiating table or whether we are headed toward conflict.

GAZETTE: On Sunday, Secretary of State Pompeo described Iran’s calls for retaliation as “a little noise.” How likely is Iran to follow through on its threats and what kinds of actions would they likely have in mind to satisfy a desire for payback for Suleimani’s death?

SHERMAN:  They have said they would certainly take action against military sites of the United States, but added [Monday] that they are not limited to military sites. There’s some concern that they will use cyber as a tool. They have a lot of options on the ground. There are any number of soft targets around the world, including in our own country, that could see retaliation, so they will pick a time and place and method of their choosing, and they mean to keep everybody on guard as this proceeds forward. We’ve seen several countries issue alerts for their citizens. The United States has issued alerts for American citizens worldwide and, more specifically, in particular countries. So we are on greatly heightened alert all over the world, and it is of tremendous concern.

GAZETTE: Broadly, what are some of the immediate and longer-range dangers this situation poses to the U.S. and our allies? What are some of the potential worst-case scenarios?

SHERMAN: Clearly, the worst-case scenario is that we’re headed to war, and war would be horrific. The United States’ conventional capability is much greater than Iran’s. There’s no doubt about it. And so, in conventional terms, there’s no question we would win such a war. But Iran has many asymmetric capabilities, and we have seen in other theaters where we overmatched our opponents, our opponents sometimes use asymmetric warfare. It happened, quite frankly, in Vietnam, [and] that really makes it quite difficult for us to prevail in the way that we wish to. So I have no question about America’s military strength. We are unparalleled in conventional terms, and we can do any number of things. I do think, however, that the president’s tweets about cultural sites, about going after citizens after doing whatever he feels is necessary, is not only provocative, but, in many instances, [would be] illegal under international law and considered war crimes.

GAZETTE: Who benefits from a conflict with Iran? Oil prices are already up, and analysts predict they could double. China and Russia have harshly criticized the U.S. actions, more strongly than allies like the U.K. and France. Could we see an alliance of convenience between Russia, China, and Iran and what would that mean for the world?

SHERMAN: The alliance of convenience already exists, and it could grow deeper over this. So they stand to gain. But I don’t think anyone in the world stands to gain if there’s conflict in the Middle East because it will undermine the global economy as well the U.S. economy. I think it will have a downward effect for everyone. And obviously, there will be unintended consequences that none of us can imagine and quite terrible ones.

GAZETTE:  Clearly, this a very volatile, fast-moving situation that’s hard to predict.

SHERMAN: Yes, I think it will change dramatically. A month ago, there were anti-regime protesters in Iran; there were anti-Iranian protesters in Baghdad. Today, all of the protesters are anti-American. I don’t know how any of this has made the U.S. safer, as Secretary Pompeo said all day [Sunday]. It has not; it has made us all much more at risk. Ironically, President Trump has told us that he didn’t trust our intelligence community for months and months and months. And now, he says that the intelligence sent to him [persuaded him] to take this action, but he can’t tell us what that intelligence was. So we are in an upside-down world where I hope the U.S. Congress takes action to slow the president down before he hurls us into war.

This interview has been edited for clarity and condensed for length.