Her actions were in response to an email UC Berkeley administrators wrote to event sponsors Tuesday, saying they cancelled the event because they say they won't be able to protect participants from rioting if it should happen.
In February, masked agitators shut down a speaking event by Milo Yiannopoulos, a former editor of the conservative Breitbart News site.
Just one day after announcing they would not allow controversial conservative author Ann Coulter to speak on campus because of safety concerns, officials at the University of California at Berkeley reportedly said on Thursday the school was reversing its decision, and they had found a venue where Coulter could speak, the Washington Postreported.
But Coulter told her 1.47 million Twitter followers not to "fall" for Berkeley's version of events.
She said she accepted the terms but the school called off the event anyway.
The Berkeley College Republicans invited Coulter to speak on the subject of illegal immigration.
Young America's Foundation, a conservative group that books Coulter's campus speeches, did not immediately respond to a request for comment Thursday. We regret this outcome-especially given our unqualified support for our students' right to bring speakers of their choosing to the University, and our deep commitment to the values and principles embedded in the First Amendment of the U.S. Constitution.
"We have been unable to find a safe and suitable venue", said the letter from Vice Chancellor Scott Biddy and Vice Chancellor for Student Affairs Stephen Sutton.
While Registered Student Organizations like yours are independent from the University, and have the right to invite whoever they'd like to speak here, the campus retains responsibility for ensuring safety and security during such events. Unfortunately, UCPD determined that, given now active security threats, it is not possible to assure that the event could be held successfully-or that the safety of Ms. Coulter, the event sponsors, audience, and bystanders could be adequately protected-at any of the campus venues available on April 27th.
Many on the famously liberal Cal campus opposed the appearance, including the student newspaper the Daily Californian, who said that the pundit's "only qualifcation is stirring the pot" and that her speech would not include productive discussion.
"We want this event to take place safely and successfully", he said.