“In the political equivalent of ‘get off my lawn,’ Donald Trump on Friday declared his Miami golf course off limits to anyone from the Spanish-language broadcast company Univision over its decision to dump the Miss USA beauty pageant,” Reuters reports. Trump owns the Trump National Doral Miami golf resort.

The declaration by Trump is the latest salvo in an escalating war of words that followed remarks by Trump aimed at Mexican immigrants. As we reported previously, Univision scrapped plans to air the Miss USA Pageant, in which Trump is a part owner, following his comments earlier this month.

Trump’s remarks also prompted a statement from NBC, where Trump hosts “Celebrity Apprentice,” in which the network attempted to put some distance between itself and the outspoken GOP presidential candidate.

In a letter to Univision CEO Randy Falco following the Univision announcement on the Miss USA Pageant, Trump wrote: “Please be advised that under no circumstances is any officer or representative of Univision allowed to use Trump National Doral, Miami — its golf courses or any of its facilities.”

Reuters adds: “He also told Falco to stop work on a gate separating the Univision building from Trump National. ‘If this is not done within one week, we will close it,’ he said.”

Trump reportedly maintained a hard line on immigration. Reuters reports that he said in his letter that if he is elected he will set up a “meaningful border” between the U.S. and Mexico.

The report quotes Trump saying in the letter: “Please congratulate your Mexican government officials for having made such outstanding trade deals with the United States. However, inform them that should I become president, those days are over. We are bringing jobs back to the U.S.”