United States President Donald Trump commented on the possible resignation of Keir Starmer as Prime Minister of the United Kingdom through a Truth Social post on Sunday.

"Keir Starmer will resign as Prime Minister of The United Kingdom. He failed badly on two very important subjects- IMMIGRATION AND ENERGY (OPEN NORTH SEA OIL!). I wish him well! President DJT" the post stated.

A report from Britain's Observer newspaper indicated that Starmer was set to resign on Monday and outline a schedule for his exit, yet a government source rejected this assertion, stating that Starmer stays focused on carrying out the responsibilities of governing.

The pressure on Starmer's leadership, which has grown over several months, intensified on Friday after his opponent Andy Burnham secured a parliamentary seat that could enable a formal challenge for party leadership.

Trump's Growing Strains with Starmer

This marks another instance of Trump criticizing the UK Prime Minister in recent months. Relations between the two leaders have strained due to differences on immigration policies and especially the US military operations in Iran.

Trump posted on Truth Social in March to fault Starmer, asserting that he contributed to damaging the nations' traditionally strong ties after London prevented the initial use of British bases for strikes on Iran.

In that message, Trump noted he would recall the absence of British backing during the Iran conflict.

"The United Kingdom, our once Great Ally, maybe the Greatest of them all, is finally giving serious thought to sending two aircraft carriers to the Middle East," Trump stated.

"That's OK, Prime Minister Starmer, we don't need them any longer - But we will remember. We don't need people that join Wars after we've already won!"

Reuters contributed to this report.