Now that Donald Trump has been sworn in as president of the United States, one campaign promise some are hoping he doesn’t deliver on is ending protection for young immigrants known as DREAMers.

At a Phoenix campaign rally where Trump’s supporters shouted, “build a wall,” Trump named other immigration-related actions that he would take in the first few days of his presidency.

“We will immediately terminate President Obama's two illegal executive amnesties,” said then-candidate Trump.

He promised to do away with a protection from former President Obama for DREAMers. DACA, as that executive order is known, allows those young immigrants to come out of the shadows by granting them work permits and a driver's license if they're going to college or serving in the military and do not have a criminal record.

As Donald Trump becomes president, those young people fear deportation. On Friday, DREAMers in San Antonio gathered to call for 100 days of action to protect immigrants.

Democratic Congressman Joaquin Castro, who represents northwest San Antonio, took to Twitter, saying to Trump:

“DREAMers are as American as you or I. We need immigration policies that respect their humanity and reflect our nation's values.”

DREAMers might also find an ally in former President Obama. In the final days of his presidency, he said that he would lobby Congress to keep DREAMers in the country.