Barack Obama actually said...

"The burden of meeting these responsibilities lies with the Iranian government, and they are now the ones that need to make that choice."

"if Iran does not take steps in the near future to live up to its obligations, then the United States will not continue to negotiate indefinitely, and we are prepared to move toward increased pressure."

"We are engaging not because we believe in talking for talking's sake, but because the strategy of refusing to engage failed."

"We must make human rights the cornerstone of our Iran policy."