In his speech, Trump plans to single out several campaign opponents by name. People familiar with Trump's prepared remarks said he intends to go after former Florida governor Jeb Bush for having said many immigrants come to the United States out of an "act of love"; to cast Sen. Marco Rubio (Fla.) as a typical politician for once trying to achieve comprehensive immigration reform, a priority of President Obama's; and to accuse former Texas governor Rick Perry of being weak and unable to secure his state's border with Mexico.
Trump, a billionaire real estate mogul and reality television star, wants to make the case that other candidates are beholden to big donors and corporate lobbyists who are advocating changes to immigration law, but that he won't be influenced by anyone because he's funding his own campaign.
Sam Nunberg, a Trump adviser, said Trump's goal is to be a conduit for Republicans who feel like outsiders within their own party, especially on immigration.
"His persona is a mix of Ross Perot and Ronald Reagan," Nunberg said in an interview Friday. "A successful businessman disliked by the elites, a natural communicator, and someone who speaks for and is part of the conservative base."
Trump is expected to be greeted in Phoenix by protesters, just as he was at another campaign event Friday in Los Angeles, where he met with the families of crime victims who were killed by people who had come to the United States illegally.
"The illegals come in and the illegals killed their children," Trump said. "And we better get smart in the United States."
Before touching down in Phoenix, Trump will be in Las Vegas, where he will address Freedom Fest, a gathering of libertarian-minded activists. He also plans to hold a news conference in Las Vegas.