While the negotiating details still aren’t fully known, the French made clear Saturday that they objected to a nuclear agreement that British Prime Minister David Cameron and President Barack Obama were all too eager to sign. These two leaders remind no one, least of all the Iranians, of Tony Blair, Margaret Thatcher, Ronald Reagan or George W. Bush. That left the French to protect against a historic security blunder, with Foreign Minister Laurent Fabius declaring in an interview with French radio that while France still hopes for an agreement with Tehran, it won’t accept a “sucker’s deal.”

And that’s exactly what seems to have been on the table as part of a “first-step agreement” good for six months as the parties negotiated a final deal. Tehran would be allowed to continue enriching uranium, continue manufacturing centrifuges, and continue building a plutonium reactor near the city of Arak. Iran would also get immediate sanctions relief and the unfreezing of as much as $50 billion in oil revenues—no small deliverance for a regime whose annual oil revenues barely topped $95 billion in 2011.

In return the West would get Iranian promises. There is a promise not to activate the Arak reactor, a promise not to use its most advanced centrifuges to enrich uranium or to install new ones, a promise to stop enriching uranium to 20%, which is near-weapons’ grade, and to convert its existing stockpile into uranium oxide (a process that is reversible).

What Iran has not promised to do is abide by the Additional Protocol of the Nuclear Nonproliferation Treaty (NPT), which imposes additional reporting requirements on Iran and allows U.N. inspectors to conduct short-notice inspections of nuclear facilities. The International Atomic Energy Agency (IAEA) has complained for years that Iran has refused to answer its questions fully or provide inspectors with access to all of its facilities. IAEA inspectors have been barred from visiting Arak since August 2011.

In other words, the deal gives Iran immediate, if incomplete, sanctions relief and allows it to keep its nuclear infrastructure intact and keep expanding it at a slightly slower pace. And the deal contains no meaningful mechanisms for verifying compliance. “What we have to do is to make sure that there is a good deal in place from the perspective of us verifying what they’re doing,” President Obama told NBC’s Chuck Todd in an interview Wednesday. What we have is the opposite.

The President also told Mr. Todd that if Iran fails to honor the deal the U.S. can re-apply existing sanctions: “We can crank that dial back up.”

That’s also misleading. Once sanctions are eased, the argument will always be made (no doubt by Mr. Obama) that dialing them back up will give Iran the excuse to restart enrichment. Any “interim” agreement gives more negotiating leverage to Iran. If Iran really intends to cease its nuclear program, it should be willing to do so immediately and unconditionally.

All of this echoes the strategy Iran pursued after its illicit nuclear facilities were discovered in 2002. Current Iranian President Hasan Rouhani was his country’s nuclear negotiator from 2003 to 2005, when Iran briefly suspended its civilian and military nuclear work in the teeth of intense international pressure (and American armies on its borders with Iraq and Afghanistan). That previous suspension is treated by U.S. negotiators as a model of what they might achieve now.

It’s really a model of what they should beware. “Tehran showed that it was possible to exploit the gap between Europe and the United States to achieve Iranian objectives,” Hossein Mousavian, Mr. Rouhani’s deputy at the time, acknowledged in his memoir. “The world’s understanding of ‘suspension’ was changed from a legally binding obligation” to “a voluntary and short-term undertaking aimed at confidence building.”

Now the U.S. seems to be falling for the same ruse again. This time, however, Iran is much closer to achieving its nuclear objectives. No wonder Israel’s Benjamin Netanyahu felt compelled to warn the Administration and Europe that they risked signing “a very, very bad deal,” a blunt public rebuke from a Prime Minister who has been notably cautious about criticizing the White House. The Saudis, who gave up on this Administration long ago, are no doubt thinking along similar lines. The BBC reported last week that the Kingdom has nuclear weapons “on order” from Pakistan.

The negotiators plan to resume talks on November 20, and France will be under enormous pressure to go along with a deal. We hope Messrs. Hollande and Fabius hold firm, and the U.S. Congress could help by strengthening sanctions and passing a resolution insisting that any agreement with Iran must include no uranium enrichment, the dismantling of the Arak plutonium project and all centrifuges, and intrusive, on-demand inspections. Anything less means that Iran is merely looking to con the West into easing sanctions even as it can restart its program whenever it likes.

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