THE BURNED OVER DISTRICT

And some are questioning whether they have given themselves enough time to reach a workable agreement with dotted i's and crossed t's.

With only a month to go before a deadline for finalizing a nuclear accord with Iran, Secretary of State John Kerry began a major push Saturday to conclude the agreement.

Mr. Kerry and Mohammad Javad Zarif, the Iranian foreign minister, met Saturday at a luxury hotel here for six hours of talks. It was the first high-level negotiating round since the two sides settled on the outline of an agreement on April 2 in Lausanne, Switzerland.

A State Department official described the session as “thorough and comprehensive” and said the negotiators were committed to staying on schedule “to get this done.”

But experts have begun to question the wisdom of negotiating against a deadline, especially because some major issues remain unresolved. Rushing an accord, they say, might work to Iran’s advantage by building pressure on the United States and its negotiating partners to make concessions.

“It is a tall order for them to finish by the end of June, especially to get the technical annexes done in sufficient detail to avoid implementation problems,” said Robert J. Einhorn, who served on the American delegation to the Iran talks until 2013. “The negotiators should take whatever time they need, even if it means working past June 30.”

Gary Samore, who was the senior National Security Council official on weapons of mass destruction during President Obama’s first term, said American officials should be prepared to negotiate through the summer.

“Tactically, it is better to extend the talks to demonstrate that we aren’t desperate for a deal at any cost,” said Mr. Samore, who is a member of the group United Against Nuclear Iran.

Our Secretary of State Old Horse Face Kerry believes that deadlines for negotiators to reach an agreement. Let's hope he doesn't stick to his beliefs to get any agreement rather than a good one.