The university said no on-campus organization agreed to sponsor the event, which was required after a policy change in 2016.
Nearly immediately after the rally was announced, plans sprang up for a counterprotest called "BTHO Hate" - the name referring to a Texas A&M football chant to "beat the hell outta" opposing teams.
Disclosure: Texas A&M University and Tony Buzbee have been financial supporters of The Texas Tribune.
Wiginton was responsible for an event last December featuring controversial speaker Richard Spencer, who is scheduled to return again for September's event. "Linking the tragedy of Charlottesville with the Texas A&M event creates a major security risk on our campus".
University officials said the decision was made after consulting with law enforcement and considerable study due to concerns about the safety of its students, faculty, staff, and the public. "If you're white, you can not express yourself", he said.
"However, in this case circumstances and information relating to the event have changed and the risks of threat to life and safety compel us to cancel the event". She urged House members to stand with her, and they did so, gathering at the front of the chamber.
Rep. Paul Workman, R-Austin, said Aggies in the House call upon Texas A&M University System Chancellor John Sharp "to try to intervene and try to keep this from happening on our campus".
Similar sentiments came from the Texas Senate, which held its own moment of silence. "Free speech means nothing in America right now". Charles Schwertner, whose district includes College Station, said of protests that had been planned in response to Wiginton's now-canceled rally.
"I will never know what it is like to be a student of color at Texas A&M University and in this world, but I acknowledge that this rally, offensively hosted on September 11th, signifies hatred", Brooks said.