Biden administration throws cold water on prospect of renewed Iran nuclear talks

After the supreme leader of Iran signaled a willingness to return to nuclear negotiations with the United States, the Biden administration cast doubt on the likelihood of resuming talks in the near future.

"We will judge Iran's leadership by their actions, not their words," a State Department spokesperson said Tuesday.

"If Iran wants to demonstrate seriousness or a new approach, they should stop nuclear escalations and start meaningfully cooperating with the IAEA," they added, referencing the International Atomic Energy Agency, an intergovernmental watchdog that Tehran has often subverted.

Ayatollah Ali Khamenei gave Iran's newly installed president, reformist Masoud Pezeshkian, the go-ahead to relaunch talks with the U.S. on Tuesday while warning the country's government against putting any trust in Washington.

"This does not mean that we cannot interact with the same enemy in certain situations," Khamenei said, according to the official transcript of his remarks. "There is no harm in that, but do not place your hopes in them."

The State Department spokesperson said the administration still saw a negotiated solution as the best way to contain Iran's nuclear program, but that Iran's failure to cooperate with the IAEA and its escalatory actions made diplomacy impossible.

"We are far away from anything like that right now," they said.

Members of the administration also largely view the prospect of returning to indirect talks with Iran as a politically unfavorable step that could prove detrimental to Vice President Kamala Harris' and other Democrats' chances at winning in November, several officials told ABC News.

The doubtful outlook for resuscitating negotiations in the coming months further diminishes the already low odds of securing a deal with Iran before President Joe Biden's time in the White House comes to an end, all but pushing his promise to negotiate a "longer and stronger" agreement out of reach.

Khamenei's comments Tuesday echo the position he took around the time Tehran signed off on the 2015 nuclear pact known as the Joint Comprehensive Plan of Action, or the JCPOA -- a landmark accord that granted Iran relief from economic sanctions in exchange for limiting its nuclear program.

Former President Donald Trump withdrew the U.S. from the agreement in 2018, calling it "a horrible one-sided deal that should have never, ever been made," and reimposing financial restrictions on Iran.

In the years since, Khamenei's public comments on the matter have oscillated between encouraging negotiations with the U.S. and outright dismissing the possibility of a renewed pact.

Foreign policy observers say the upcoming U.S. presidential election is injecting even more uncertainty into the prospects of reaching another nuclear agreement with Iran.

Trump has previously made unsubstantiated claims that Iran was ready to accept conditions that were highly favorable to the U.S. at the end of his term and that he was "ready to make a deal." But on the campaign trail, Trump -- a sworn enemy of the Iranian regime -- has taken an increasingly hawkish stance against the country, which reportedly carried out a cyberattack targeting his campaign and has plotted against him and his former Cabinet officials.

Harris has also promised to take an aggressive approach to curbing Iran's malign influence in the Middle East, but she supported the JCPOA, as well as the current administration's efforts to cut a new deal. However, she has not clearly said whether she would attempt to pick up where Biden left off.

Indirect talks with Iran under the Biden administration officially kicked off in April 2021. Despite mediators' initial optimism, talks eventually sputtered out after multiple rounds of stop-start diplomacy failed to move both sides toward an agreement.

So far, Biden has made good on another of his major promises regarding Iran: his declaration that the country would "never get a nuclear weapon on my watch."

However, officials within his administration say Tehran has made substantial progress toward that goal in recent years.

In July, Secretary of State Antony Blinken said Iran was likely only "one or two weeks away" from having breakout capacity to produce fissile material for a nuclear weapon, and that the U.S. was watching "very, very carefully" to see whether the country would move toward weaponizing its nuclear program, a step the administration says the regime has not yet taken.

The U.S. shutting down the possibility of any renewed talks with Iran right now comes amid heightened tensions in the Middle East, including Israel's preemptive strike Saturday night on Hezbollah targets in Lebanon.