JACKSON, Tenn. (AP) — A Tennessee man authorities say is a white supremacist has pleaded guilty to plotting to kill then-presidential candidate Barack Obama and dozens of other black people in 2008.

Twenty-one-year-old Daniel Cowart of Bells, Tenn., pleaded guilty Monday to eight of 10 counts in an indictment accusing him of conspiracy, threatening a presidential candidate and various federal firearms violations. Under a plea agreement, he faces 12 to 18 years in prison, but a federal judge could choose a longer sentence.

Co-defendant, 19-year-old Paul Schlesselman of Helena-West Helena, Ark., pleaded guilty in January and will be sentenced April 15.

Authorities have described the two as skinheads who planned a cross-country robbing and killing spree that would end with an attack on Obama.

Copyright 2010 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.