Washington: US President Donald Trump described Chicago Mayor Brandon Johnson as 'useless' on Saturday, stressing that Iran cannot possess a nuclear weapon. According to Anadolu Agency, Trump made his remarks on his Truth Social platform, suggesting that someone should explain to the Pope about the Chicago Mayor's ineffectiveness and reiterating his stance on Iran's nuclear capabilities. The statement from Trump followed a social media post by Mayor Johnson, who shared images of his meeting with Pope Leo XIV on the US platform X. Johnson expressed his honor in meeting the Pope, describing it as a significant and humbling experience. Johnson had joined the Chicago faith community and Pope Leo XIV at the Vatican for a multi-faith prayer, which he referred to as one of the most awe-inspiring events of his life.