Because of their high profile celebrities are more vulnerable to stalking than other people and politicans are no exception. A team of researchers from Canada surveyed 424 politicians from both the Federal (national) and Provincial (local) assemblies and found that 29.9% had experienced harassment. 87% of those who had experienced harassment thought that the perpetrator had a mental-health problem. Both Federal and Provincial politicians had experienced harassment and overt threats and subsequent physical approach. Harassers who did not overtly threaten but who both telephoned and wrote more frequently were more likely to approach politicians.
Adams, Susan J. ... [et al] - Harassment of Members of Parliament and the Legislative Assemblies in Canada by individuals believed to be mentally disordered Journal of Forensic Psychiatry and Psychology December 2009, 20(6), 801-814