What president's secret service nickname was ''Rawhide''?

Ronald Reagon
Rawhide was the 'not so secret' code name for Ronald Ragan. Here is a list; including the current presidents code name, which you might find useful:

* Renegade: Barack Obama, President-elect * Renaissance: Michelle Obama, president-elect's wife * Radiance: Malia Obama, president-elect's daughter * Rosebud: Sasha Obama, president-elect's daughter * Trailblazer: George W Bush, President * Tempo: Laura Bush, First Lady * Rawhide: Ronald Reagan, ex-President * Smurfette: Kareena Gore, ex-vice-president's daughter