WASHINGTON – President Obama is calling Iran “a state sponsor of terrorism” in his first interview with an Arab newspaper, as he tries to sell skeptical regional allies on a nuclear deal with the terror-backing state.

It was his toughest comments about Iran since the US and other nations reached the tentative nuclear pact with Tehran.

Obama gave the interview to the Saudi-owned Asharq al-Awsat on the eve of a Camp David summit with leaders and officials of the Gulf Cooperation Council, which represents Persian Gulf Arab nations — although several heads of state are skipping the Camp David affair Thursday.

“The countries in the region are right to be deeply concerned about Iran’s activities, especially its support for violent proxies inside the borders of other nations,” Obama said, a reference to Hezbollah and other groups.

“Iran clearly engages in dangerous and destabilizing behavior in different countries across the region. Iran is a state sponsor of terrorism. It helps prop up the Assad regime in Syria. It supports Hezbollah in Lebanon and Hamas in the Gaza Strip. It aids the Houthi rebels in Yemen,” Obama said.

Obama made his reassuring comments as he prepares to brief Arab allies on the status of the nuclear framework reached with Iran following months of negotiations with the regime that included a half-dozen nations.

Anxious about the Iranian threat, Gulf nations are seeking security guarantees from the US. Obama told the paper “there should be no doubt about the commitment of the United States to the security of the region” and our Gulf partners.

He also called for “working to resolve the conflicts across the Middle East that have taken so many innocent lives and caused so much suffering for the people of the region.”

“When it comes to Iran’s future, I cannot predict Iran’s internal dynamics. Within Iran, there are leaders and groups that for decades have defined themselves in opposition to both the United States and our regional partners,” the president said.

“I’m not counting on any nuclear deal to change that. That said, it’s also possible that if we can successfully address the nuclear question and Iran begins to receive relief from some nuclear sanctions, it could lead to more investments in the Iranian economy and more opportunity for the Iranian people, which could strengthen the hands of more moderate leaders in Iran. More Iranians could see that constructive engagement — not confrontation — with the international community is the better path,” he added.

Obama also said the US was taking a “hard look” at the Israeli-Palestinian conflict, and called for both sides to demonstrate a “genuine commitment” to a two-state solution.

It appears Obama isn’t taking Saudi King Salman bin Abdulaziz Al Saud’s decision to skip the Camp David summit too hard. The newspaper is controlled by the king’s sons.