FOX News contributor and GWU law professor Jonathan Turley reacts to the Supreme Court taking on the birthright citizenship case. MARTHA MACCALLUM, FOX NEWS: So the discussions that have gone on in the Supreme Court today,

The Supreme Court is weighing whether to allow President Donald Trump’s restrictions on birthright citizenship to temporarily take effect in most of the country, even if they might ultimately be found unconstitutional.

His executive order on citizenship drew intense scrutiny, but it has not yet taken effect. Many of his other policies have immediately upended the system.