CHEQUERS, BUCKINGHAMSHIRE, England — President Donald Trump said Thursday that he once told Charlie Kirk he could become president, speaking at a press conference with Prime Minister Keir Starmer at Chequers, near Aylesbury. 'A great American was heinously assassinated for speaking his mind,' Trump declared. 'Incredible future—gone.' Kirk, 31, was gunned down by a lone assailant last week while addressing students at Utah Valley University. Trump thanked British supporters who gathered in London to mourn Kirk, calling his murdered friend 'a great young mind' whose voice was silenced by violence. He noted that more than 100,000 conservatives descended on London on Saturday to protest Starmer ahead of Trump’s state visit, with rallies for free speech and messages mourning Kirk.