US President-elect Donald Trump kept it simple at a private ‘Villains and Heroes’ costume party on Long Island, New York by going as a billionaire Republican set to take up residence in the White House.

Attending the lavish bash thrown by Republican billionaire Robert Mercer, a fund manager and generous donor, Trump reportedly pointed to himself and said “me” when asked who he had come as, Politico reports.

Federal Election Commission records show Mercer poured millions into a Super PAC that supported Ted Cruz and Donald Trump in their White House races.

The website associated with Super PAC Make America Number 1, which is chaired by Mercer’s daughter, says that its main goal was to “defeat crooked Hillary” Clinton.

In one of the few pictures of Mercer’s party posted on social media, Trump can be seen posing alongside Republican campaign manager and top strategist Kellyanne Conway, who appeared to be dressed as Superwoman.

Donald Trump dressed as himself for the Villains and Heroes costume party hosted by donor Robert Mercer pic.twitter.com/EFHgwrNzam — Jennifer Epstein (@jeneps) December 4, 2016

According to Bloomberg, the event was attended by a mixture of political figures and activists, with costumes ranging from 1930s gangsters and Cruella de Vil, to Supreme Court Justice Ruth Bader Ginsburg.

Ginsburg became the subject of an infamous Trump Twitter rage back in July, after she criticized him, calling him a “faker”– for which she later apologized.

Justice Ginsburg of the U.S. Supreme Court has embarrassed all by making very dumb political statements about me. Her mind is shot - resign! — Donald J. Trump (@realDonaldTrump) July 13, 2016

Is Supreme Court Justice Ruth Bader Ginsburg going to apologize to me for her misconduct? Big mistake by an incompetent judge! — Donald J. Trump (@realDonaldTrump) July 13, 2016

If I win the Presidency, we will swamp Justice Ginsburg with real judges and real legal opinions! — Donald J. Trump (@realDonaldTrump) July 13, 2016

While the president-elect showed no obvious signs of a costume, his detractors on Twitter say he really went as a “villain.”