Joseph Cannon covers The Plot to Kill Obama? Worth reading. Cannon also links to this story:
In the federal arrest affidavit, an agent with the Alcohol, Tobacco and Firearms Bureau writes that Johnson told a Secret Service agent, described only as SA Torres, that "Adolf had, in fact, threatened to kill Obama on a prior occasion ... that he wanted to kill Obama on the day of his inauguration and ... would specifically use a 22-250 sniper rifle."
Special Agent Shane Abraham of the ATF goes on to write, "Johnson then told (SA Torres) there were no political reasons for wanting to kill Obama, the only reason is because Obama is black."
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In jail, Johnson was asked by a reporter if he felt there was a plot to kill Obama.
Johnson said, "Looking back at it, I don't want to say yes, but I don't want to say no."