In 1892 Butler was trying to get back into the public limelight denied him since the end of the war. His statements appear to be uncorroborated.
"But there were limits to what Lincoln would do to secure a second term.
He did not even consider canceling or postponing the election. Even had that been constitutionally possible, "the election was a necessity." "We can not have free government without elections," he explained; "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." He did not postpone the September draft call, even though Republican politicians from all across the North entreated him to do so. Because Indiana failed to permit its soldiers to vote in the field, he was entirely willing to furlough Sherman's regiments so that they could go home and vote in the October state elections -but he made a point of telling Sherman, "They need not remain for the Presidential election, but may return to you at once."
Though it was clear that the election was going to be a very close one, Lincoln did not try to increase the Republican electoral vote by rushing the admission of new states like Colorado and Nebraska, both of which would surely have voted for his reelection. On October 31, in accordance with an act of Congress, he did proclaim Nevada a state, but he showed little interest in the legislation admitting the new state. Despite the suspicion of both Democrats and Radicals, he made no effort to force the readmission of Louisiana, Tennessee, and other Southern states, partially reconstructed but still under military control, so that they could cast their electoral votes for him. He reminded a delegation from Tennessee that it was the Congress, not the Chief Executive, that had the power to decide whether a state's electoral votes were to be counted and announced firmly, “Except it be to give protection against violence, I decline to interfere in any way with the presidential election.”
"Lincoln", pp. 539-40 by David H. Donald
Walt
"I beg leave to report that the troops have all arrived, and dispositions made which will insure quiet. I enclose copy of my order No. 1, and trust it will meet your approbation. I have done all I could to prevent secessionists from voting, and think it will have some effect."