"Make America Great Again" is an American political slogan and movement most recently popularized by Donald Trump during his successful 2016 presidential campaign. "MAGA" is also used to refer to Trump's political base, or to an individual or group of individuals from within that base. The slogan became a pop culture phenomenon, seeing widespread use and spawning numerous variants in the arts, entertainment and politics, being used by both those who support and those who oppose Trump's presidency. Originally used by Ronald Reagan as a campaign slogan in his 1980 presidential campaign, it has since been described as a loaded phrase. Multiple journalists, scholars, and commentators have called the slogan racist, regarding it as dog-whistle politics and coded language.

The 2016 presidential campaign of Donald Trump was formally launched on June 16, 2015, at Trump Tower in New York City. Trump was the Republican nominee for President of the United States in the 2016 election, having won the most state primaries, caucuses, and delegates at the 2016 Republican National Convention. He chose Mike Pence, the sitting governor of Indiana, as his vice presidential running mate. On November 8, 2016, Trump and Pence were elected president and vice president of the United States. Trump's populist positions in opposition to illegal immigration and various trade agreements, such as the Trans-Pacific Partnership, earned him support especially among voters who were male, white, blue-collar, working class, and those without college degrees. Many voters in the Rust Belt, who gave Trump the electoral votes needed to win the presidency, switched from supporting Bernie Sanders to Trump after Hillary Clinton won the Democratic nomination.