The U.S. Supreme Court has ruled that children born in the U.S. are citizens under the Fourteenth Amendment, even if their parents are in the country unlawfully or temporarily

The decision could reshape more than 150 years of legal precedent and determine whether children born on U.S. soil automatically become American citizens

President Donald Trump attended oral arguments in the case, underscoring his staunch opposition to granting automatic citizenship to many immigrants' babies.