Cruz's campaign said Thursday afternoon the senator has invited Trump to the U.S. Capitol for an event to "call on members of Congress to defeat the catastrophic deal that the Obama Administration has struck with the Islamic Republic of Iran."
Later Thursday afternoon, Cruz tweeted that Trump had accepted his invitation.
The rally is set for Sept. 9, said Mike Rudin, a spokesman for Tea Party Patriots, one of three sponsors of the event. The others are the Center for Security Policy and Zionist Organization of America.
A super PAC supporting Cruz is taking aim at Democratic presidential frontrunner Hillary Clinton with a series of ads suggesting voters are tired of the controversies surrounding her.
The super PAC, known as Keep the Promise I, released the first video in its "Clinton Fatigue" series Tuesday, a 30-second spot that shows two doctors walking through a hospital ward, diagnosing illnesses such as "email scandals" and "questionable donations from foreign governments." At the end, a voice on an intercom says, "Paging Dr. Cruz, Dr. Cruz."
The video "will run initially online," according to the super PAC, which said it "enlisted an A-List Hollywood Team to create the ad." Asked if the super PAC will put the ad on TV at some point, Keep the Promise I president Kellyanne Conway replied, "If Hillary is still in the race then, we'll consider it."
Clinton, meanwhile, is set to visit Texas next month for a campaign swing through Dallas.
The former U.S. secretary of state will drop in on the city for a public event on Sept. 22, a campaign official said Friday. Clinton will also attend a fundraiser while in Dallas.
In June, Clinton held her first public event in Texas, a speech on voting rights at Texas Southern University. She has since returned to raise money in the Rio Grande Valley.
Former Arkansas Gov. Mike Huckabee dropped in on Texas on Tuesday, the latest presidential candidate to bring his campaign to the Lone Star State.
Huckabee's trip did not include any public events, as it did when he visited Houston in May and gave a speech on energy policy. Instead, Huckabee participated in "private meetings" while in the state Tuesday, according to a spokeswoman for his campaign, Alice Stewart.
According to the election proclamation, those interested in running in the special election have until Sept. 2 to file candidacy papers with the secretary of state.
The San Antonio Express-News previously reported that Tomas Uresti, the brother of state Sen. Carlos Uresti, is in the running for the seat as is Joe Farias’ son, Gabe.
On the Republican side, the Express-News’ Gilbert Garcia reported that retired firefighter John Lujan and Army National Guardsman Robert Casias are interested in running.
Early voting in the special election begins Oct. 19.