The Department of Homeland Security is revoking the legal protections for hundreds of thousands of people from Cuba, Haiti, Nicaragua and Venezuela.

The decision means that the migrants could be deported starting next month.

The parolees have been in the United States on a humanitarian program that President Trump’s administration said has been abused.

“Parole is inherently temporary, and parole alone is not an underlying basis for obtaining any immigration status,” the Department of Homeland Security said.

The decision has already been challenged in court by a group of American citizens and parolees, The Associated Press reported.

“None are identified by their real names because they fear deportation. Among them are Maksym and Maria Doe, a Ukrainian couple; Alejandro Doe, who fled Nicaragua following the abduction and torture of his father; and Omar Doe, who worked for more than 18 years with the U.S. military in his home country of Afghanistan,” the report said.

“They didn’t do anything illegal. They followed the rules,” Kyle Varner, a doctor and real estate investor from Spokane, Washington, who is part of the lawsuit and who spoke to the AP, said.

“They have done nothing but work as hard as they can. … This is just such a grave injustice,” Varner, who sponsored 79 Venezuelans himself, said.

He said that almost all of the immigrants he sponsored stayed in his home where he assisted in teaching them English and getting jobs and driver’s licenses.

“The Trump administration is trying to attack parole from all angles,” Esther Sung, an attorney from the Justice Action Center, the group that filed the lawsuit along with Human Rights First, said. “The main goal, above all, is to defend humanitarian parole. These have been very, very successful processes.”

“It’s taking the livelihood away from thousands and thousands of people who are here legally, rendering them undocumented and putting their lives at risk,” Guerline Jozef, executive director of the Haitian Bridge Alliance, said.