US President Donald Trump’s anti-Iran foreign policy is “ill-advised” and based on no “broad strategy,” says former Secretary of State John Kerry.

The American diplomat, who took part in negotiations with Iran and other world powers under former President Barack Obama, made the comment in an interview with CNN on Saturday.

“I think it’s a very dangerous and ill-advised move that is not based on any broad strategy,” said the former Massachusetts senator, calling the deal the “single strongest, single most accountable, single most transparent nuclear agreement anywhere in the world.”

Former Secretary of State John Kerry exits following the funeral service for the late Senator John McCain at the Washington National Cathedral, September 1, 2018 in Washington, DC.

In May, Trump pulled the US out of the agreement, called the Joint Comprehensive Plan of Action (JCPOA), despite objection from the other signatories, the UK, Russia, Germany, China and France, further re-imposing the anti-Iran sanctions lifted under the deal.

The president has been at loggerheads with Kerry ever since, mocking him on Twitter.

“I see that John Kerry, the father of the now terminated Iran deal, is thinking of running for President,” Trump tweeted last week. “I should only be so lucky — although the field that is currently assembling looks really good — FOR ME!”

Speaking on Fareed Zakaria GPS, Kerry also censured Trump for his infrastructure policies.

“Our infrastructure is in desperate need,” he said. “We should be ashamed of what is happening now.”