A federal judge in Maryland on Monday ordered the Trump administration to explain how it will enforce President Donald Trump's executive order that would deny citizenship to children born on U.S. soil to unlawful immigrants or those on temporary immigrant status,

Birthright citizenship automatically makes anyone born in the United States an American citizen, including children born to mothers in the country illegally. The right was enshrined soon after the Civil War in the Constitution’s 14th Amendment. The U.S. is among about 30 countries where birthright citizenship is applied.

The ruling left unsettled the question of whether children born to immigrants without full legal status in the United States are entitled to automatic citizenship. So what happens now?