In a brief defending its ban on citizens from six Muslim-majority countries, President Donald Trump’s Justice Department approvingly cited a segregation-era Supreme Court decision that allowed Jackson, Mississippi, to close public pools rather than integrate them.

In the early 1960s, courts ordered Jackson to desegregate its public parks, which included five swimming pools. Instead, the city decided to close the pools. Black residents of Jackson sued. But in 1971, the Supreme Court, in a 5-4 decision, decided that closing the pools rather than integrating them was just fine.

The dissents, even at the time, were furious. “May a State in order to avoid integration of the races abolish all of its public schools?” Justice William O. Douglas asked in his dissent.