Paul Schlesselman, 19, of Helena-West Helena, Arkansas, plead guilty on Thursday to charges he plotted to kill then-Sen. Barack Obama and dozens of other black people in 2008.
Schlesselman pleaded guilty in U.S. District Court to one count of conspiracy, one count of threatening to kill and harm a presidential candidate and one count of possessing a firearm in furtherance of a crime of violence.
He faces up to 10 years in prison when he is sentenced in April.
A co-defendant, Daniel Cowart, 21, of Bells, Tenn., remains in custody.
According to The Associated Press, authorities have described the two as white supremacist skinheads who hatched a plot for a cross-country robbery and killing spree that was to culminate with an attack on Obama, who was then a candidate for president.
They were arrested in October 2008 and have been held without bond since.
Authorities have said that although the two had enough guns to create carnage, they never got close to carrying out their plans.