A federal judge is set to hear the first arguments in a multi-state lawsuit seeking to block President Donald Trump’s executive order ending the constitutional guarantee of birthright citizenship regardless of the parents' immigration status.

US President Donald Trump’s proposal to end birthright citizenship has led to questions about its potential implications for Usha Vance, the wife of US Vice President JD Vance and the first Indian-origin Second Lady of the United States.

Here's a guide to what birthright citizenship is, what happens if Trump's order ends it, and what comes next after lawsuits were filed.