As America approaches its 250th anniversary, the Constitution and the oath to defend it remain a lasting source of unity beyond politics.

Constitutionally, America is still an English place: Lockean in peace, Hobbesian in war. That is why it has managed to last for 250 years

America has come to a landmark moment of pride and patriotism — and a time of division and doubt. As the country turns 250 on Saturday, Americans are stepping out for celebrations…