Former President Donald Trump used his social media platform, Truth Social, to criticize Chicago Mayor Brandon Johnson while Johnson was meeting Pope Leo XIV at the Vatican. Trump called Johnson 'useless' and suggested that someone should inform the Pope of this fact, linking it to his concerns about Iran's nuclear capabilities. Johnson, who shared photos from the meeting on X, expressed that it was one of the most awe-inspiring experiences of his life and praised the Pope as a 'magnificent human.' Trump's post drew attention for its unusual combination of attacking a sitting mayor during a significant religious meeting and for its abrupt shift to foreign policy. This criticism aligns with Trump's recent pattern of targeting Democratic mayors, framing their governance as indicative of broader Democratic failures. Johnson has openly criticized the Trump administration's immigration policies and cuts to federal funding for cities. The meeting at the Vatican was reportedly part of a larger multi-faith prayer gathering, and Trump was not present.