President Trump warned that a "massive" war could break out in the Middle East over Iran's nuclear program, after the U.N. nuclear watchdog said Iran wasn't complying with its nonproliferation duties.

The deal provided Iran sanctions relief for limits on its nuclear program. But now there's new Iranian leadership and more uranium in their stockpile than when Trump abandoned the agreement.

Iran has announced new nuclear steps aimed at the incoming Biden administration, but the U.S. has leverage to push back, argues analyst Henry Rome.