Donald Trump announced in May 2011 that he would not seek the Republican presidential nomination in 2012, ending months of speculation and a brief period during which polls had placed him among the leading potential candidates despite his political inexperience and no campaign infrastructure.

Trump's flirtation with the race had been characterized by a series of provocations designed to generate maximum media coverage—most notably his sustained promotion of the theory that Barack Obama had not been born in the United States. When Obama released his long-form birth certificate in April 2011, Trump initially declared victory for having forced the release, then continued suggesting the document might be fraudulent.

His announcement came shortly after Obama's address to the White House Correspondents' Dinner, at which the president delivered a sustained and publicly devastating mockery of Trump's presidential ambitions while Trump sat in the audience maintaining a strained neutral expression. The same weekend, Obama announced the killing of Osama bin Laden.

Trump cited the demands of his business empire as the reason for stepping aside—a rationale that his critics dismissed as cover for poll numbers that had declined as his more extreme positions received scrutiny.

The 2012 Republican field ultimately nominated Mitt Romney, and Trump endorsed him. The episode was widely treated at the time as an entertaining but peripheral sideshow—evidence that celebrity candidacies could generate press without generating serious political momentum.

Four years later, Trump would run again. He would not step aside that time.