The Washington Post today reports:

In 2012, Obama won reelection with the support of more than 70 percent of Latinos and Asian Americans, two of the nation’s fastest-growing voting blocs whose electoral power is expected to play an even bigger role this fall. Democrats are targeting those groups in their bid to not just to hold onto the White House but also to win back control of at least one chamber of Congress.

Clinton, who has said she would seek to expand Obama’s executive actions on immigration, called the Supreme Court’s outcome “a stark reminder of the harm Donald Trump would do to our families, our communities and our country.”

Obama's order provided protection against deportation for parents whose children are citizens or legal permanent residents. It allowed them to get work permits. According to the 5th Circuit, whose ruling Obama appealed, " the administration had not provided adequate public notice before attempting to change federal enforcement policies after Obama announced the program through executive action."

Via the LA Times article linked above:

The ruling does not mean that the government will now begin deporting people who might have been eligible for Obama’s program. Speaking at the White House after the ruling, Obama emphasized that parents of U.S. citizens “will remain low priorities for enforcement. As long as you have not committed a crime, our limited immigration enforcement resources are not focused on you.”