Donald Trump is visiting Mexico today, where he’ll meet privately with Mexican President Enrique Peña Nieto. Among those believed to be going are former New York Mayor Rudolph Giuliani and Alabama Senator Jeff Sessions. This comes as Trump is slated to give a major speech on immigration in Arizona tonight. Trump has made the mass deportation of 11 million undocumented immigrants one of the cornerstone proposals of his campaign, although under his new campaign manager, Kellyanne Conway, he appears to be backing away from the plan. Trump has also vowed to build a wall across the entire length of the U.S.-Mexico border and force Mexico to pay for it. He’s also called Mexicans “rapists” and “criminals.” Mexican President Enrique Peña Nieto has fiercely criticized Trump in the past, once comparing him to Adolf Hitler and Benito Mussolini.