The email was sent before Trump threatened new airstrikes against Iran and then relented, over the weekend, after Saudi Crown Prince Mohammed bin Salman and other Gulf leaders talked him out of it. Among the plans were attacking Pickaxe Mountain and other Iranian sites reportedly housing nuclear equipment or material.

Those sites are deep underground, however, and would have likely required deploying American ground troops, which Trump is trying to avoid. Eighteen American service members have been killed in the war, according to official counts, and the administration has been criticized for its lack of transparency on military casualties.

“At the end of the day, POTUS will want a deal, so he’ll continually look for ways to get tough and get out of this,” an unnamed source told CNN. “You need creative minds at times—especially if you’re running out of conventional options.”