On March 11, 2016, the Donald Trump presidential campaign cancelled a planned rally at the University of Illinois at Chicago (UIC), in Chicago, Illinois, citing "growing safety concerns" due to the presence of thousands of protesters in and outside of his rally.

Thousands of anti-Trump demonstrators responding to civic leaders' and social media calls to shut the rally down had gathered outside the arena, and several hundred more filled seating areas within the UIC Pavilion, where the rally was to take place. When the Trump campaign announced that the rally would not take place, there was a great deal of shouting and a few small scuffles between Trump supporters and anti-Trump protesters.

Plans to protest the Trump rally were launched a week in advance by a variety of community and student groups who largely organized via social media. Some 43,000 undergraduate and graduate students had signed a petition asking UIC to cancel the rally by March 6. That same day, Latino leaders in the city, led by Democratic U.S. Representative Luis Gutierrez of Chicago, issued a call to their constituents to join them in a protest outside of the UIC Pavilion, where the rally was to take place. One of many student-based protests was first proposed by 20-year-old Chicago political activist and Bernie Sanders supporter Ja'Mal Green, who had posted to Facebook a week urging others to "get your tickets to this. We're all going in!!!! #SHUTITDOWN." Green told reporters that the plan was for protestors to make noise when Trump appeared, "and then rush the stage." While "activist groups did try to disrupt the event, ... many protesters said that they learned of the demonstrations on social media and went of their own accord."

MoveOn.org confirmed that it helped promote the protest and paid for printing protest signs and a banner. Among those who took part in organizing the protest included members of the UIC faculty, People for Bernie, the Fearless Undocumented Association, Black Lives Matter, Assata's Daughters, BYP100, College Students for Bernie, and Showing Up for Racial Justice, with "black, Latino and Muslim young people" at the "core" of the crowds of protesters.

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