The case that the Supreme Court raised specifically concerns the migrant program Daca, which affects nearly 800,000 young paperless, often called "dreamers," writes NBC News.
The Court finds that the government has not sufficiently explained the reason for terminating the federal program. The Trump government may return with additional information, but judges do not believe it is so close to a presidential election.
The issue of the status of migrants in the United States is one of Trump's most important domestic policy issues, both as president and in the election campaign that got him elected. In addition, during his presidential term, Trump has nominated two judges for HD, which means that a majority is nominated by Republicans.
Crucial voiceBut the ruling is one of Trump's biggest setbacks to domestic politics so far. Five judges voted against Trump's proposal, while four voted in favor. Remarkable is that Chief Justice John Roberts, nominated by Republican President George W Bush, cast the deciding vote.
The Daca (Deferred Action for Childhood Arrivals) program was introduced by then Democratic President Barack Obama in 2012 through a presidential order. It concerns young people who came to the United States illegally as a child.
The program protects them from deportation and gives them an opportunity to work and reside legally in the country for two years at a time, provided that they are behaving and not engaging in crime. This is partly due to the motivation that children cannot be held responsible for their parents' actions, that the "dreams" cannot be raw because they were taken to the United States.
Criticizing ObamaDonald Trump, like many leading Republicans, believes it was wrong for Obama to make such an important decision through a presidential order. During the 2016 election campaign, Trump pledged to demolish Daca, in favor of "real" legislation.
Trump's attempt to demolish Daca was immediately appealed and has been halted by federal courts in both New York and California, to have now also been stopped in the Supreme Court.