Republican presidential candidate Mitt Romney admitted that his "red line" on an Iranian nuclear program is identical to the stated policy of his opponent in the upcoming US elections, US President Barack Obama.

In an interview with ABC, portions of which were published online Friday, interviewer George Stephanopoulos asked Romney if his "red line" is the same as Obama's.

"Yes," the Republican candidate answered.

"My red line is Iran may not have a nuclear weapon," Romney explained. "Iran as a nuclear nation is unacceptable to the United States of America."

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