The new case seeks to clarify the immigration laws and resolve an issue that has divided past administrations and the 9th Circuit Court of Appeals.

The Supreme Court agreed Monday to review a policy used under past administrations to deny migrants a chance to apply for asylum on the Mexican border until space opened up to process claims.

As President Donald Trump’s mass deportation effort falls short of its lofty targets, his administration is redeploying federal forces in ways rarely seen before, expanding the military’s role at the southern border and sending heavily armed agents deep into US cities.