Alfonso Aguilar Feels ‘Misled’ on Trump’s Immigration Plan

Trump Outlines 10-Point Plan for Immigration Reform 4:23

A key Latino Donald Trump supporter said he felt "disappointed and misled" after the GOP presidential nominee appeared to double down on a pledge of mass deportation for undocumented immigrants.

Alfonso Aguilar, the president of the Latino Partnership for Conservative Principles, took to Twitter after Trump said during a speech on Wednesday that he would target "every undocumented immigrant."

"There will be no amnesty," Trump told the crowd in Phoenix, Arizona. "Our message to the world will be this: You cannot obtain legal status or become a citizen of the United States by illegally entering our country."

In addition to his tweet, Aguilar told Politico: "It's so disappointing because we feel we took a chance, a very risky chance.”

He added: "We decided to make a big U-turn to see if we could make him change. We thought we were moving in the right direction … we’re disappointed. We feel misled.”

NBC News tried to contact Aguilar, but he was not immediately available for comment.

Tim Kaine: Donald Trump's trip to Mexico was 'diplomatic amateur hour' 4:30

Aguilar had been vehemently opposed to a Trump candidacy before joining a group of Latino conservatives to declare their support for the Republican in a letter on July 18, according to The Washington Post.

Politico quoted him Thursday as saying "there’s a real possibility we will withdraw support from Donald Trump because of that disappointing speech.”

However, Aguilar reportedly said he had no plans to support Clinton.

Trump's Arizona speech came just hours after the candidate appeared in Mexico, where he struck a more conciliatory tone after meeting with Mexican President Enrique Peña Nieto.

Trump's warm-up speakers — Rudy Giuliani and Sen. Jeff Sessions — wore "Make Mexico Great Again Also" hats.

Guiliani and Sessions Sport 'Make Mexico Great Again Also' Hats 0:56