President Donald Trump's executive order on birthright citizenship faces scrutiny as the Supreme Court examines lower courts' power to block presidential policies nationwide.

The court is considering whether to allow the proposal to go into effect at least in some parts of the country while litigation continues in lower courts.

The U.S. Supreme Court is poised on Thursday to consider Donald Trump's attempt to broadly enforce his executive order to limit birthright citizenship, a move that would affect thousands of babies born each year as the Republican president seeks a major shift in how the U.