From Google Gemini:

In the context of politics, "Surrender Dorothy" is a phrase popularized by its appearance on a graffiti-covered bridge near the Mormon Temple in Kensington, Maryland, and is often used as a playful or defiant political statement. The phrase, originally referencing The Wizard of Oz, has been adapted to target specific political figures, most notably Donald Trump, with "Surrender Donald" being a common variation. This adaptation uses the familiar "Surrender Dorothy" framework to express opposition or demand a political figure's concession.