As you know, the SC ruled that a blockade -specifically- WAS constitutional. That puts me in mind of a quote:
"We are all Republicans--we are all Federalists. If there be any among us who would wish to dissolve this Union or to change its republican form, let them stand undisturbed as monuments of the safety with which error of opinion may be tolerated where reason is free to combat it."
Thomas Jefferson, March 4, 1801
Walt