Keir Starmer, the former UK prime minister, said the UK and other European nations must strengthen ties with each other as the United States becomes less reliable under Donald Trump. Starmer warned that the shift in US relations during Trump's presidency would probably persist after he leaves office. He said European leaders have been caught out by these new realities twice already. Starmer also warned European leaders of the threat posed by Russia. His comments marked his first major political intervention since leaving office.