DACA, the Deferred Action for Childhood Arrivals, was a program created by President Obama that allowed undocumented immigrants brought to the country as children to receive a renewable two-year period of deferred action from deportation. It also allowed those people to become eligible for a work permit if they had no felonies or only minor misdemeanors on their record. It included some 700,000 people.

In September of 2017, Trump’s administration announced that it would shut down the program.

Trump put the onus on Congress to decide whether or not to create a permanent version through legislation.

Congress failed to pass any legislation on the issue, but the phase-out of DACA was held up in courts, and is to be taken up by the US Supreme Court in 2020. Trump also later blamed Democrats for DACA’s demise.

The New York Times – Trump Moves to End DACA and Calls on Congress to Act
NPR – Trump Ends DACA, Calls On Congress To Act
Wikipedia – Deferred Action for Childhood Arrivals