U.S. Supreme Court

"Today we are asked whether the land these treaties promised remains an Indian reservation. ... Because Congress has not said otherwise, we hold the government to its word," wrote Justice Gorsuch.

The decision could directly affect the election, which will take place in November amid a pandemic and a partial economic collapse.

The decision is a dramatic victory for immigration advocates and gives a new lease on life for the so-called DREAMers, immigrants who were brought to the U.S. illegally as children.