Descending from these general principles, we find the proposition that in legal contemplation the Union is perpetual confirmed by the history of the Union itself.  The Union is much older than the Constitution.  It was formed, in fact, by the Articles of Association in 1774.  It was matured and continued by the Declaration of Independence in 1776.  It was further matured, and the faith of all the then thirteen States expressly plighted and engaged that it should be perpetual, by the Articles of Confederation in 1778.  And, finally, in 1787 one of the declared objects for ordaining and establishing the Constitution was “to form a more perfect Union.”

But if the destruction of the Union by one or by a part only of the States be lawfully possible, the Union is less perfect than before the Constitution, having lost the vital element of perpetuity.

It follows from these views that no State upon its own mere motion can lawfully get out of the Union; that resolves and ordinances to that effect are legally void; and that acts of violence, within any State or States, against the authority of the United States, are insurrectionary or revolutionary, according to circumstances.

I therefore consider that, in view of the Constitution and the laws, the Union is unbroken; and to the extent of my ability I shall take care, as the Constitution itself expressly enjoins upon me, that the laws of the Union be faithfully executed in all the States.  Doing this I deem to be only a simple duty on my part; and I shall perform it so far as practicable, unless my rightful masters, the American people, shall withhold the requisite means, or in some authoritative manner direct the contrary.  I trust this will not be regarded as a menace, but only as the declared purpose of the Union that it will constitutionally defend and maintain itself.

In doing this there needs to be no bloodshed or violence; and there shall be none, unless it be forced upon the national authority.  The power confided to me will be used to hold, occupy, and possess the property and places belonging to the Government, and to collect the duties and imposts; but beyond what may be necessary for these objects, there will be no invasion, no using of force against or among the people anywhere.  Where hostility to the United States, in any interior locality, shall be so great and universal as to prevent competent resident citizens from holding the Federal offices, there will be no attempt to force obnoxious strangers among the people for that object.  While the strict legal right may exist in the government to enforce the exercise of these offices, the attempt to do so would be so irritating, and so nearly impracticable withal, that I deem it better to forego for the time the uses of such offices.