FORT COLLINS, Colo. – Illegal immigrant students at Colorado State University are worried about President-elect Donald Trump’s vow to reverse many of President Obama’s executive actions.

They’re most concerned, of course, with the Deferred Action for Childhood Arrivals program Obama enacted by executive action in 2012 to shield children of illegal immigrants from deportation and provide a means for them to stay in the country to work or pursue higher education.

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“President-elect Donald Trump has promised to ‘immediately terminate’ DACA – an action that would have a swift and dramatic impact on about 28,000 DACA applicants in Colorado who have been approved since its inception in 2012,” The Fort Collins Coloradoan reports.

The DACA program is easily reversed because it was not approved by an act of Congress, according to the news site.

The situation has prompted students across the country to hold rallies and pressure university officials to declare campuses as “sanctuaries” for DACA students and other illegal immigrants, and about 300 university presidents have signed on to a statement of support for DACA that offers to meet with U.S. leaders about the issue, according to the Pamona College website.

At CSU, hundreds of students gathered recently at the Lory Student Center Plaza to protest the potential end to the DACA program with picket signs and shouted slogans, KUSA reports.

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CSU officials joined the list of colleges opposing the change last Wednesday, joining officials at other Colorado schools like Metropolitan State University and the University of Denver that are already backing the cause.

“We also wanted to write on behalf of the University administration to state our support for our undocumented students as members of our campus community and our pride in your extraordinary leadership and success,” CSU officials wrote in an email to undocumented students following the recent protest.

The Nov. 14 protest was organized by DACA student Brithany Gutierrez, an 18-year-old who revealed her illegal immigration status during the rally earlier this month.

“I don’t know Mexico,” Gutierrez said of the possibility of returning to the country her family immigrated from illegally when she was 8 years old. “I mean, I remember it, but it’s changed a lot. I don’t know people in Mexico.”

There are, however, a lot of students like herself at CSU. A total of 125 illegal immigrant students attend the university, she said, and some are not protected by DACA. The Coloradoan points out that because federal guidelines issued by Obama prohibit public schools from requiring proof of citizenship, anyone can attend, regardless of DACA or citizenship status.

DACA protects those students from deportation, however, and allows them to obtain a driver’s license and work in the U.S.

“How am I supposed to get to school if I can’t drive?” Gutierrez questioned. “And how am I supposed to pay for any extra costs if I can’t work?”

She said illegal immigrant students are now waiting for Trump to take office to find out what their future holds, though Gutierrez and others are still receiving DACA renewals under President Obama.

“It’s a lot of anxiety,” she said. “I don’t know what’s going to happen.”