The Wikileaks group last week released emails from the Democratic National Committee. Russia is accused of carrying out the hack. Some 30,000 of the stolen emails are yet to be released. On Wednesday, Mr Trump urged Russia to find them. “Russia, if you’re listening, I hope you’re able to find the 30,000 emails that are missing,” he said. “I think you’ll be rewarded mightily by our press.” The emails would contain some “beauties”, he said. “This has to be the first time that a major presidential candidate has actively encouraged a foreign power to conduct espionage against his political opponent,” Jake Sullivan, Mrs Clinton’s senior policy advisor, said. “This has gone from being a matter of curiosity, and a matter of politics, to being a national security issue.” Mrs Clinton’s campaign manager, Robby Mook, said Russia carried out the hack to weaken the Democrats and help Mr Trump. The FBI is continuing its investigation into the leak, which included emails that showed DNC officials, who are supposed to remain neutral, favoured Mrs Clinton, and derided her Democratic rival Bernie Sanders. In a statement released within an hour of Mr Trump’s comments, his vice-presidential candidate Mike Pence said there would be “serious consequences” if the FBI could prove Russia was attempting to interfere with the election.