LITTLE ROCK, Ark. (AP) — Two white supremacists accused of plotting to assassinate Barack Obama are on lockdown in their Tennessee jail cell. The Arkansas Democrat-Gazette reported Sunday that 20-year-old Daniel Cowart of Tennessee and 18-year-old Paul Schlesselman of Arkansas are under the lockdown for their protection. Obion County Sheriff Jerry Vastbinder says they were separated from other inmates at the request of federal authorities.