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?

The nationwide injunction, from a Maryland case, is more permanent than last month’s restraining order from a judge in Seattle.

U.S. President Donald Trump's effort to curtail automatic birthright citizenship as part of his hardline immigration crackdown suffered a further setback on Thursday as a fourth judge declared it unconstitutional.