MIAMI: Donald Trump challenged Russian intelligence to hack into Hillary Clinton’s emails on Wednesday, albeit insisting that he had no relations with Russia as he tossed aside suggestions that Moscow was conniving to get him elected. The New York billionaire and Republican nominee for president used a sweeping news conference to undermine his Democratic rival, astonishingly imply that Vladimir Putin used a racial slur against President Barack Obama and to promise a heyday of US-Russian relations under a Trump presidency. “I have nothing to do with Russia,” said the political neophyte, who frequently insists that he would get Putin’s respect and who has alarmed NATO allies by refusing to promise them unconditional support in the event of a hostile attack. On Wednesday, Trump said he had never met or spoken to the Russian leader but cast doubt over accusations that Moscow was behind a hack of Democratic Party emails that embarrassed his rival Hillary Clinton’s campaign.