Anchored by Jake Tapper, The Lead airs at 4 p.m. ET on CNN.
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(CNN) – The U.S. is currently negotiating to try to get Iran to stop what the U.S. believes is a nuclear weapons program.
Secretary of State John Kerry has been working to get that nuclear deal done almost since he began his time at the State Department.
"It's the final stages of this. That's often when the tough discussions, the tough decisions are made, and we're certainly hopeful that will be the case, but we're working toward that (November 24 deadline)," State Department spokeswoman Jen Psaki said in an interview with CNN's "The Lead with Jake Tapper."
But there is already a move in Congress to block the deal, Sen. Mark Kirk, R-Illinois, warns that Iran will use a weak deal as cover to get nuclear weapons.
"We certainly disagree with that," said Psaki.
"We believe this is the best chance we have to prevent Iran from acquiring a nuclear weapon, and we would encourage any member to wait for the final details. Don't give a grade to the thesis paper based solely on the headline. Look at the content and see what you think at that point," she said.
For more of our interview with State Department spokeswoman Jen Psaki, check out the video above.