We believe that this election is a turning-point in our history; for, although there are four candidates, there are really, as everybody knows, but two parties, and a single question that divides them. The supporters of Messrs. Bell and Everett have adopted as their platform the Constitution, the Union, and the enforcement of the Laws. This may be very convenient, but it is surely not very explicit. The cardinal question on which the whole policy of the country is to turn--a question, too, which this very election must decide in one way or the other--is the interpretation to be put upon certain clauses of the Constitution. All the other parties equally assert their loyalty to that instrument. Indeed, it is quite the fashion. The removers of all the ancient landmarks of our policy, the violators of thrice-pledged faith, the planners of new treachery to established compromise, all take refuge in the Constitution,-- "Like thieves that in a hemp-plot lie, Secure against the hue and cry." In the same way the first Bonaparte renewed his profession of faith in the Revolution at every convenient opportunity; and the second follows the precedent of his uncle, though the uninitiated fail to see any logical sequence from 1789 to 1815 or 1860. If Mr. Bell loves the Constitution, Mr. Breckinridge is equally fond; that Egeria of our statesmen could be "happy with either, were t' other dear charmer away." Mr. Douglas confides the secret of his passion to the unloquacious clams of Rhode Island, and the chief complaint made against Mr. Lincoln by his opponents is that he is _too_ Constitutional.