Nearly six months after a majority of British voters voted to secede from the E.U., interest was building among Californians on the possibility of a “Calexit” from the U.S. In fact, supporters were proposing a referendum to take place in 2019. Although the two exits would be comparable—two large states of empire-scale unions (California’s economy being larger than that of France, and California’s population being larger than that of Poland)—the reasons for a Brexit are more fundamental than those for a Calexit. As a result, the secession of Britain from the E.U. would have a firmer foundation in terms of political theory.
The full essay is at "Calexit and Brexit."