British Prime Minister Boris Johnson called President Trump a “great deal maker,” and said what a disaster the Iran nuclear deal had been in the Obama-era.

“If we’re going to get rid of it, let’s replace it, and let’s replace it with the Trump deal,” Johnson said in an interview with Dan Walker on BBC “Breakfast,” as reported by BizPacReview. “President Trump is a great deal maker, by his own account and others,” Johnson said. “Let’s work together to replace the JCPOA [Joint Comprehensive Plan of Action] and get the Trump deal instead.”

The 2015 JCPOA is the nuclear deal negotiated with Iran under the Obama administration.

Johnson said Iran must be prevented at all costs from obtaining a nuclear weapon, as it is the world’s No. 1 sponsor of terrorism.n “We’ve got to stop the Iranians acquiring a nuclear weapon. … That’s what the Joint Comprehensive agreement does,” he said.

After President Trump won the 2016 election, he withdrew from the Iranian nuclear deal in 2018 and imposed more substantial sanctions on Iran.

British Ambassador Rob Macaire was detained in Iran for several hours in Tehran on Saturday after riots erupted against the Iranian government when angry Iranians called for the removal of key figures in the government. This followed Iran’s denial of downing the Ukrainian passenger jet, killing all 176 people on board. Mounting evidence forced them to admit liability.

Macaire had been attending a vigil for the crash victims, which included British nationals. He was arrested a short time later.

“Thanks for the many goodwill messages. Can confirm I wasn’t taking part in any demonstrations! Went to an event advertised as a vigil for victims of #PS752 tragedy. Normal to want to pay respects—some of victims were British. I left after 5 mins when some started chanting,” Macaire tweeted on Sunday.