Former Conservative leader William Hague has urged US President Donald Trump not to withdraw from the Iran nuclear deal - saying it would "broadcast a message that Washington does not honour its word".
Trump has branded the deal - agreed by his predecessor Barack Obama - as the "worst" ever backed by the US and will announce his decision on whether to back out of the plans on Tuesday.
But Hague, writing in the Daily Telegraph, said ripping up the deal would be a "very great error".
"If he is wavering, he should picture himself sitting across from Kim (Jong-Un) in the near future."
Hague said Kim was less interested in Trump keeping his word than whether the United States does.
"Ending the Iran deal would mean that what the US signs up to in one year, it can abrogate three years later," Hague said.
"And that in turn would not bode well for an agreement with North Korea or the stability of the Middle East - and thereby for the peace of the world."
