Secretary of State John Kerry, when asked Wednesday whether there was any new deadline to reach agreement on a nuclear deal with Iran, responded:

"We have our own sense of deadline."

Negotiators on Tuesday set a new deadline of July 7 to work out a deal with Iran. This week's deadline was the fourth missed deadline in the process to replace a November 2013 interim agreement that was supposed to last six months.

But despite Kerry's comments, there is a deadline beyond which the political consequences of not reaching a deal become real: If Congress receives an agreement with Iran by July 9, it will have only 30 days to review it. If the deal comes in later, Congress has 60 days, giving opponents more time to argue against the deal.

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