A self-taught computer hacker convicted of compromising the emails of one of Hillary Clinton’s closest advisers said the White House’s allegations of a Russian-led cyber campaign aimed at the recent U.S. presidential race are overblown. Marcel Lehel Lazar, a Romanian national better known by the alias “Guccifer,” doubts the Obama administration’s claims with respect to Russia’s widely believed meddling in the 2016 U.S. presidential election, Fox News reported Wednesday.