Former US president Donald Trump says the new nuclear deal is much worse than the original 2015 Obama-era agreement and can usher in “the end of Israel”.

Talking through telephone to Fox News on Wednesday, Trump warned of the potential for a weaker agreement with Tehran, saying that the Biden administration's attempt to restructure and re-sign the deal could mean Israel's doom, unless “Israel’s going to have to take up the fight”.

Referring to his withdrawal from the JCPOA, he said he ended “a terrible deal but it was better than the deal” they want to sign with the Islamic Republic now, noting that “Israel is in tremendous peril, tremendous danger… because there is a very quick roadmap for them (Iran) to have a nuclear weapon and a lot of nuclear weapons”.

Criticizing the administration for the potential agreement, he said, “What they’re doing in Congress, and what Biden is doing, I can’t imagine that they would allow this to happen”.

Earlier in April, a group of US Republican senators called on the administration to provide Israel with the military capabilities it needs to defend itself from a nuclear-armed Iran, reiterating that the administration “would put at risk the existence of the State of Israel and the governments of our Arab allies, destroy America’s position in the Middle East, and ultimately threaten the US homeland”.