Olivia Marsdin

Olivia Marsdin is the President of the United States on Earth Thirty-Eight. She is secretly an alien, masquerading as a human.

Early life
The unnamed alien known by the alias "Olivia Marsdin" kept her true nature hidden for years and had a great political career, until she became President of the United States running against an unknown male candidate.

Presidential pardon to J'onn J'onzz
When J'onn J'onzz (turned into a fugitive after he was forced to reveal his true identity as a Green Martian who has pretend to be Hank Henshaw for over fifteen years) helped to defeat Non and Indigo, Olivia Marsdin granted him a full presidential pardon and re-instated him as D.E.O.'s director.

Signing of the decree on the rights of aliens
President Olivia Marsdin arrived in National City to sign a decree on granting aliens the rights of US citizens. However, as soon as she got off the plane, she was attacked and nearly killed if not for the intervention of Supergirl. Later the President was taken to D.E.O. for her safety until they felt that the offender was caught; then she gave her speech and was about to sign the decree, when she was attacked again and the culprit turned out to be Scorcher. Supergirl saved again the situation and, the nex day, at the D.E.O., Olivia Marsdin thanked again the heroine for having save her life. As she walk away, her face briefly morph, showing she's not human.

Personality
Olivia is show be progressive, positive, encouraging and extremely charismatic.

Powers

 * Shapeshifting: Olivia has the power to appear human.

Abilities

 * Expert tactician/leader: Olivia is highly intelligent, enough that she became President of the United States, she is a capable tactician, as she managed to keep her alien identity a secret, even from the government itself.

Supergirl
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Season 2
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Trivia

 * Olivia Marsdin is the only (and presumably the first) Pesident of the United States who is an alien; despite the D.E.O. and the government itself are unaware of this.

Behind the scenes

 * Lynda Carter starred as Diana Prince/Wonder Woman in the TV series Wonder Woman (1975-1979). She also previously guest starred in the TV series Smallville as Moira Sullivan.
 * A veiled reference is made to Wonder Woman's Invisible Plane when President Olivia Marsdin tells Supergirl "you ought to see my other jet".
 * Another reference is made to Diana Prince's spin transformation from the Wonder Woman TV series: when Supergirl notices she's on fire, she does a similar spin to put out the flames.
 * In the original draft of Invasion!, Lynda Carter was intended to play the new President of the United States of Earth One; acting as a doppelgänger of the Olivia Marsdin of Earth-38. At the suggestion of the studio, the role was changed, as they thought it would be too confusing. Eventually, Lucia Walters got the role, and an original character was created.