Donald Trump is planning to discard a program which grants work permits to people who came to the US as children.
The DACA program, also known as 'Dreamers', protects nearly 800,000 young men and women from being deported to their countries of origin and allows them to legally work in America.
It was created while Barack Obama was president, and his predecessor is set to scrap it.
However, the US leader has provided a six-month delay until the programme ends, which sources saying to Reuters this was to allow Congress a chance to replace it.
The key legislative body in the US government will need to devise suitable laws in its stead.
Most of the 'dreamers' are Hispanic, and an estimated 25% of them - 200,000 - are thought to be living in California.
A further 100,000 live in Texas, while a number also reside in New York, Florida, and Illinois.
A number of tech giants - like Facebook and Apple - had urged the President to not discard the progam.