The Defense Department said Friday it is finding new ways to contain Iran and pressure it to stop supporting terrorism as part of President Trump's newly unveiled Iran strategy.

The department is reviewing all its security cooperation with allies, placement of forces and military plans as the administration pursues a more aggressive tack with the Middle East nation, according to Maj. Adrian Rankine-Galloway.

"We are identifying new areas where we will work with allies to put pressure on the Iranian regime, neutralize its destabilizing influences, and constrain its aggressive power projection, particularly its support for terrorist groups and militants," he said in an email statement.

In a speech Friday, Trump confirmed that he will not recertify the 2015 Iran nuclear deal aimed at heading off Iran from developing nuclear weapons, and that his administration will instead focus on countering its destabilizing activities in the Middle East, support of terrorism, and pursuit of ballistic missiles. He also threatened to leave the Iran nuclear deal unless tougher steps are taken to rein in Iran

"In recognition of the increasing menace posed by Iran, and after extensive consultations with our allies, I am announcing a new strategy to address the full range of Iran's destructive actions," Trump said.

Tehran supports militias in Iraq, Syria, and Yemen where U.S. forces are fighting the Islamic State and al Qaeda, and that support was linked to the death of hundreds of troops during the Iraq war last decade.

The Iran Revolutionary Guard Corps, which is controlled by the country's supreme leader, is also accused of supporting terrorist groups like Lebanon's Hezbollah and Hamas. Trump on Friday designated that group as a terrorist entity, and called for tougher U.S. sanctions against the IRGC.