WASHINGTON (AP) — Law enforcement agents have broken up a plot by two neo-Nazi skinheads to assassinate Democratic presidential candidate Barack Obama and shoot or decapitate 88 black people, the Bureau of Alcohol, Tobacco Firearms and Explosives said Monday. In court records unsealed Monday in U.S. District Court in Jackson, Tenn., federal agents said they disrupted plans to rob a gun store and target a predominantly African-American high school in a murder spree that was to begin in Tennessee. Agents said the skinheads did not identify the school by name. Jim Cavanaugh, special agent in charge of ATF’s Nashville field office, said the two men planned to kill 88 people, including 14 African-Americans by beheading.