On Air Force One, Lois meets and speaks with the President of the United States.
In the year 2018 on a TV broadcast, it's revealed Lex had just become the President-elect.
- Season One: "Hourglass"
- Season Seven: "Apocalypse (alternate universe)
- Season Ten: "Finale, Part 1, Finale, Part 2"
- On the show, it has been alluded to several times that Lex's destiny is to become the President of the United States. In 2018, he is indeed elected president.
- Whenever Lex is shown as president, he wears a black glove on his right hand.
In the Comics
Lex Luthor became the President of the United States, winning the election on a platform of promoting technological progresses for the common people (his first action as president was to take a proposed moratorium on fossil-based fuels to the U.S. Congress in hopes of putting "a flying car in every garage"). Despite Luthor's more villainous traits, he was assisted by the extreme unpopularity of the previous administration due to its mishandling of the Gotham City earthquake crisis. Ironically, Batman would ultimately learn that Luthor was involved in the mishandling of the entire Gotham City rebuilding process, resulting in Bruce to sever all military contract ties between the U.S. government and his company Wayne Enterprises in protest of Lex Luthor's election as President. Lex responded in kind by ordering the murder of Batman's lover Vesper Fairchild and framing Bruce Wayne for the murder.
An early triumph of his political career was his handling of the Imperiex War, in which he coordinated the U.S. Army, Earth's superheroes, and a number of untrustworthy alien forces to battle the story's villain, Imperiex. However, as it would later be revealed, Lex knew about the alien invasion in advance and did nothing to alert Earth's heroes to it.
Lex Luthor finally accepted Superman's identity as Clark Kent, which he had been aware of from almost their earliest meetings but refused to accept for his own personal belief that people of power always crave and reflect themselves as people of power, never as one of the masses, thus to Luthor a being like Superman would never try to pass himself off as Clark Kent who was no one of extreme note. In a story published in 2002, when a lowly scientist was able to get a meeting with Lex and reveal top secret government documents showing the rocket containing baby Superman crashing near the farm of Martha and Jonathan Kent. Killing the scientist, Lex surprisingly decided to keep the knowledge a secret even as when Clark Kent took the fall for Lois publishing proof that Lex Luthor knew of the alien invasion of "Our Worlds At War" but had opted not to make any defensive plans to save the people of Kansas from attack. Clark was fired from the Daily Planet as a result of the flap, when another Superman villain, Manchester Black, used his telepathic powers on an unknowing Lex to allow him to pass an assortment of lie detector tests (including Wonder Woman's lasso of truth) to prove that Lois and Clark's story was a lie. When Manchester Black tried to kill Superman and his friends and family members, Luthor surprisingly came to Superman's aid when Black tried to kill Lois, admitting that he had kept Superman's identity as Clark Kent secret both out of a sense of nostalgia for their past confrontations in recognition of an approaching change and the knowledge that revealing the truth about Superman would endanger Lois, almost the only woman he cared for. In the end, Manchester Black was defeated and as revenge for Lex helping Superman defeat him, Black erased all knowledge that Clark Kent was Superman from Lex's mind before taking his own life.
Later, Luthor once again overplayed his hand, as his success at framing Bruce Wayne for the murder of Vesper Fairchild caused him to get arrogant. In an attempt to blame Superman for a kryptonite meteor approaching the Earth, he instead raised questions about himself as Superman and Batman uncovered a plot of Luthor's to further torment Batman that involved tricking Batman into thinking that the Superman villain Metallo was the man who killed Batman's parents. In desperation, he used a variant combination of the "super-steroid" Venom (a steroid mainly used by Batman's villain Bane), liquid synthetic green kryptonite, and a Apokoliptian battlesuit to battle Superman directly. Unfortunately, the madness that is a side effect of Venom took hold, and he revealed his true colors during the battle. The final straw was the revelation that Talia Head, the acting head of LexCorp, had sold all the company assets to the Wayne Foundation. He has since gone underground, leaving the presidency to his vice president Pete Ross.
- The season 2 episode of the 2001 Justice League Animated Series "A Better World" opened with the reveal that a parallel version of Lex Luthor became President of the United States, only to be killed by his world's version of Superman. His counterpart in the main universe later expressed interest in running for President in Justice League Unlimited, though he confessed to faking the campaign to antagonize Superman.