Thirty-seven male prisoners who had been convicted or indicted on a charge of threatening the President or national political figure were compared to state inmates, federal inmates, and normative samples on psychometric and demographic variables. Results indicated that assassin/threateners were significantly more paranoid, schizophrenic, and socially alienated than comparison samples. Their heterosexual adjustment and work record tended to be poorer than comparison inmates. Data suggested that the probability of organic impairment was greater for assassin/threateners than for the normative sample. In addition, political threateners were found to be self-destructive, apolitical, Caucasian, and products of disturbed family backgrounds.