The Trump administration has built up a large military presence in the Middle East as talks over Iran’s nuclear program continue, with U.S. officials signaling that any potential agreement would need to go beyond enrichment and address broader security concerns.

Secretary of State Marco Rubio said in February that for negotiations to be "meaningful," they would need to address Iran’s ballistic missiles, its sponsorship of terrorist organizations across the region, its nuclear program and its treatment of its own people.

Trump told reporters aboard Air Force One on Monday that he would be involved in the talks "indirectly."

"They'll be very important and we'll see what can happen. It's been – typically Iran's a very tough negotiator. They're good negotiators or bad. I would say they're bad negotiators because we could have had a deal instead of sending the B-2's in to knock out their nuclear potential," he said. "And we had to send the B-2's. I hope they're going to be more reasonable. They want to make a deal."