Fate of Obama's immigration plan in hands of Supreme Court

Immigrants and community leaders rally in front of the U.S. Supreme Court to mark the one-year anniversary of President Barack Obama's executive orders on immigration in Washington, in this file photo taken November 20, 2015.

US: The U.S. Supreme Court takes up a case on Monday probing the limits of presidential powers as the justices weigh whether President Barack Obama overstepped his authority with unilateral action to protect millions of people in the country illegally from deportation.

The case, pitting Obama against 26 states led by Texas that filed suit to block his 2014 immigration plan, is one of the biggest of the court's current term ending in June.