Apparently, Barack Obama's secret service codename was 'Renegade'.

renegade | ˈrɛnɪɡeɪd |
noun
a person who deserts and betrays an organization, country, or set of principles: an agent who later turns out to be a renegade.
• archaic a person who abandons religion; an apostate: renegades and Deserters of Heaven, who renounce their God for the Favour of Man.
• a person who behaves in a rebelliously unconventional manner: he was a renegade and social malcontent.
adjective
having treacherously changed allegiance: a renegade bodyguard.
• archaic having abandoned one's religious beliefs: a renegade monk.