I doubt it, nothing boosts a president's popularity more than leading a nation through the hardships of a conflict. It worked for Bush. It's also a massive ego boost, as even people like me would have no choice but to look to him for leadership in such an hour of peril.
Iran will probably be the biggest war we'll be involved with since WWII, so who knows how far the chaos will extend. They say they intend to make nuclear weapons, and cut the world off of all the oil supplies they can. He may just use this to executive order his way to a permanent seat at the White House.
I'm more afraid of Iran's capabilities, as they have terrorists cells around the Middle East and possibly abroad. I imagine many mass shootings and suicide bombings will be committed in the name of the Ayatollah.