In his 2015 speech, Obama said that without an agreement limiting Iran's nuclear program in return for sanctions relief, any U.S. administration would be left with only one option to prevent Iran from getting a nuclear weapon — "another war in the Middle East."
Obama said that Iran — unrestrained by the nuclear accord — would soon be on the threshold of developing an atomic bomb. "Without this deal, Iran will be in a position — however tough our rhetoric may be — to steadily advance its capabilities. Its breakout time, which is already fairly small, could shrink to near zero."
"Does anyone really doubt that the same voices now raised against this deal will be demanding that whoever is president bomb those nuclear facilities?" Obama said.