A decision to send Solicitor General John Sauer to defend an executive order signed by Donald Trump before the Supreme Court this week was a massive mistake that could haunt the president going forward.

Justices sharply questioned Solicitor General D. John Sauer over the president's bid to end birthright citizenship and limit nationwide injunctions.

The Supreme Court hears arguments in Trump v. CASA, Trump v. Washington, and Trump v. New Jersey, a case about judges stopping President Trump's executive order that limits birthright citizenship for children born to undocumented parents.