The Supreme Court is hearing oral arguments over Pres. Trump's emergency request to roll back nationwide injunctions that block his executive order to end birthright citizenship. Now, immigration advocates are warning that if the scope of the injunction is narrowed, it could cause "real chaos on the ground." "One case ... that could happen is where babies born in some states are considered citizens, but born in others are not," ABC News Senior White House Correspondent Selina Wang said.