Judges have blocked nearly two dozen Trump administration actions, prompting some allies of President Donald Trump to suggest he should ignore court orders.

US president Andrew Jackson famously reacted to an unfavorable ruling by the Supreme Court chief justice with the defiant rejoinder: "John Marshall has made his decision, now let him enforce it." - 'Dangerous suggestions' - Supreme Court Chief Justice John Roberts warned of the danger of ignoring court rulings in a year-end letter in December that may prove to be even more prescient than he intended at the time.