Lincoln on the 1864 Presidential Election :
We can not have free government without elections; and if the rebellion could force us to forego, or postpone a national election it might fairly claim to have already conquered and ruined us. The strife of the election is but human-nature practically applied to the facts of the case. What has occurred in this case, must ever recur in similar cases. Human-nature will not change. In any future great national trial, compared with the men of this, we shall have as weak, and as strong; as silly and as wise; as bad and good. Let us, therefore, study the incidents of this, as philosophy to learn wisdom from, and none of them as wrongs to be revenged.
But the election, along with its incidental, and undesirable strife, has done good too. It has demonstrated that a people’s government can sustain a national election, in the midst of a great civil war. Until now it has not been known to the world that this was a possibility. It shows that, even among candidates of the same party, he who is most devoted to the Union, and most opposed to treason, can receive most of the people’s votes. It shows also, to the extent yet known, that we have more men now, than we had when the war began. Gold is good in its place; but living, brave, patriotic men, are better than gold.
He lays it out quite plainly in his melodious 19th century prose: if the elections are cancelled or postponed, the terrorists have already won.
It might help to consider that the decision was made during a civil war when the opposing forces came within 5 miles of the capital, when the commander-in-chief was on the battlefield. Lincoln was made of sterner stuff than the current crop of Republicans.