One of the most progressive members of Congress is fighting with President Donald Trump's border czar over migrant rights trainings, in a fight that could reverberate in Arizona.

Rep. Alexandria Ocasio-Cortez, D-N.Y., sparked Trump border chief Tom Homan's ire when she held a "Know Your Rights" webinar she said was designed to inform her constituents of their constitutional rights amid Trump's threats to crack down on migrants in the country without authorization.

At least two Democratic members of Congress from Arizona — Reps. Yassamin Ansari and Raúl Grijalva — also are providing similar outreach to migrants.

Homan argued on Fox News that Ocasio-Cortez was breaking the law.

"What she's really doing, you and I and the rest of the country knows, she's trying to teach them how to evade law enforcement," Homan said. "That's a felony."

He told Fox News host Laura Ingraham he was "working with the Department of Justice and finding out" if Ocasio-Cortez was "crossing the line" legally, and that he had raised that question with the deputy attorney general via email. Ingraham charged Ocasio-Cortez was helping migrants "game the system."

The clash could eventually come to Arizona, where the civil rights trainings have been a mainstay of migrant advocacy groups' response to Trump's agenda.

Like Ocasio-Cortez, Ansari and Grijalva have joined in the "Know Your Rights" campaign. Both have circulated English- and Spanish-language resources online, and Ansari held a bilingual tele-town hall in late January.

In a written statement to The Arizona Republic, Ansari called the prospect of a Justice Department investigation "completely ridiculous."

"My office has received no pushback or legal threats — in fact, nothing but sincere appreciation from a community that has the right to know this information," she wrote.

"In turn, we are so thankful to partners like Friendly House and Nunez law firm who have helped us get the word out. No one is 'gaming a system'; I will continue to make sure my constituents know their rights."

The issue resurfaced late last week when Ocasio-Cortez sent a letter to Trump's newly confirmed Attorney General Pam Bondi asking whether the Justice Department is investigating her office. She argued the webinars were protected under the First Amendment.

“It has been 14 days since Mr. Homan first threatened to weaponize your agency, but I have not yet heard any referral from the federal government,” Ocasio-Cortez wrote to Bondi. “Homan’s actions undercut core Constitutional rights and further transparency is necessary.”

Rep. Nancy Mace, a Republican from South Carolina, retorted Monday on social media: "Teaching illegal aliens how to evade law enforcement is a crime. Illegal aliens are not citizens, therefore they’re not your constituents. Hope this helps!"

The civil rights trainings have been offered in Arizona by immigrant advocacy groups for years. They were started years ago by groups in Phoenix in response to the immigration sweeps carried out under former Maricopa County Sheriff Joe Arpaio in the late 2000s, and later during the record deportations that took place from 2009 to 2012 during the first term of the Obama administration, advocates say.

"The whole nation is following the models started in Arizona," Erika Ovalle, a co-founder of the grassroots advocacy group Puente Arizona, told The Republic in January.

Republic reporter Daniel Gonzalez contributed reporting.