SEATTLE — A second federal judge in two days has blocked President Donald Trump’s effort to end birthright citizenship for the children of parents who are in the U.S. illegally, decrying what he described as the administration’s attempt to ignore the Constitution for political gain.

President Trump is seeking to end birthright citizenship in the United States. What is it, which other countries apply the policy and who would be affected by the order?

A second federal judge has issued an order blocking Donald Trump's administration from implementing his plan to curtail U.S. birthright citizenship, saying no court in the United States has ever endorsed the Republican president's interpretation of the Constitution.