USinfo-icon President Donald Trumpinfo-icon says he will announce whether Washington will pull out of the Iraninfo-icon nuclear deal on Tuesday.

The US is to formally decide on the issue on May 12 as European allies of the United Statesinfo-icon, particularly the UKinfo-icon, are reportedly trying to convince the president to stay in the deal backed by five other worldinfo-icon powers.

Trump's Monday tweet follows his attack on a top official from the Obama administration in charge of negotiations that yielded the deal in 2015.

"The United States does not need John Kerry's possibly illegal Shadow Diplomacy on the very badly negotiated Iran Deal.  He was the one that created this MESS in the first place," he tweeted Sunday to point the finger at the former secretary of state.

British Foreign Secretary Boris Johnson has been among the top figures making the case for Trump to keep the pact intact.

Europeans are helping pave the way for Trump to claim that he has "fixed" the deal without actually making any change to it,

The Iranian foreign minister says any possible US move to withdraw from the JCPOA will show Washington's isolation.

Johnson went as far as saying that "we need to find a way of fixing" yet arguing that one should not throw "the baby out with the bath water."

The European Unioninfo-icon, Franceinfo-icon, the United Kingdominfo-icon, and Germanyinfo-icon have expressed support for the deal in the wake of new anti-Iran claims by Israelinfo-icon.

Iran has on numerous occasions asserted that its nuclear program is merely peaceful and not meant to make nukes.