Editor's note: This story has been updated to reflect a change in the venue of the rally.

President Donald Trump is set to visit Houston on Oct. 22 to hold a rally for U.S. Sen. Ted Cruz in his re-election campaign.

Trump's campaign announced Monday evening that the rally will take place at the NRG Arena. On Thursday, organizers announced the location had been moved to the Toyota Center. The rally's date marks the first day of early voting for the November election, in which Cruz faces a strong challenge from U.S. Rep. Beto O'Rourke, D-El Paso.

Trump announced in August that he would be headlining "major rally" for Cruz in October. "I’m picking the biggest stadium in Texas we can find," Trump wrote on Twitter.

Neither NRG Arena nor the larger Toyota Center ranks among the state's biggest venues. NRG Arena bills itself as ideal for events that draw 10,000 or fewer people. The Toyota Center's capacity is around 19,000. The largest stadium in Texas is Kyle Field at Texas A&M University — it can hold over 100,000 people.

The rally is scheduled to start at 6:30 p.m.