Right before calling Iran’s response to the White House’s latest peace proposal “TOTALLY UNACCEPTABLE,” President Donald Trump lashed out at his predecessor, former President Barack Obama, for settling the tab for a Carter-era arms deal with the nation that fell through decades ago.

Taking to Truth Social Sunday afternoon, the commander in chief fumed that “Iran has been playing games with the United States, and the rest of the World” since the fall of American-aligned Shah Mohammad Reza Pahlavi in 1979.

“DELAY, DELAY, DELAY!” he described Iran’s strategy with the U.S., while also claiming the nation will be “laughing no longer” if his administration has the final word.

In his post, the president said Iran “finally hit ‘pay dirt’” with Obama, who negotiated the now-defunct Iran Nuclear Deal alongside China, France, Germany, Russia, the United Kingdom and the European Union in 2015.

“He was not only good to them, he was great, actually going to their side, jettisoning Israel, and all other Allies, and giving Iran a major and very powerful new lease on life,” Trump wrote.