IIRC, the Constitution does in fact speak to the defense of the country (and if that doesn't include the people and their rights, I don't know what 'country' means), and so in that sense it is indeed a Constitutional issue. It involves our Constitutional rights, and our being denied those rights by a foreign power. And it involves the Constitutional responsibility of the CIC and the Army to defend the country.
Are you a lawyer, Lab?
Yes, a lawyer, and I also taught constitutional law for several years.