“If all of you had voted the other way — there's about 5500 of you here tonight — I would not be the President of the United States.”

DNC Speech (2008)

As quote in D. F. Murphy, Presidential Election, 1864 https://books.google.com/books?id=_SAQAAAAYAAJ. Proceedings of the National Union Convention (June 7-8, 1864) of the Republican party

from a public lecture, as quoted in David L. Goodstein, "Richard P. Feynman, Teacher," Physics Today, volume 42, number 2 (February 1989) p. 70-75, at p. 73
Republished in the "Special Preface" to Six Easy Pieces (1995), p. xxi.
Republished also in the "Special Preface" to the "definitive edition" of The Feynman Lectures on Physics, volume I, p. xiv.

Addressed to George W. Bush in "go home, gw" http://www.moby.com/journal/2006-09-10/go_home_gw.html, journal entry (10 September 2006) at moby.com

Biden at the 2008 Vice Presidential debate. Biden-Palin Vice Presidential debates http://edition.cnn.com/2008/POLITICS/10/02/debate.transcript/, October 2, 2008
2000s

1860s, A Short Autobiography (1860)
Context: In 1846 he was elected to the lower House of Congress, and served one term only, commencing in December, 1847, and ending with the inauguration of General Taylor, in March, 1849. All the battles of the Mexican war had been fought before Mr. Lincoln took his seat in Congress but the American army was still in Mexico, and the treaty of peace was not fully and formally ratified till the June afterwards.... he voted for all the supply measures that came up, and for all the measures in any way favorable to the officers, soldiers, and their families, who conducted the war through: with the exception that some of these measures passed without yeas and nays, leaving no record as to how particular men voted. The "Journal" and "Globe" also show him voting that the war was unnecessarily and unconstitutionally begun by the President of the United States.

giving them the benefit of the doubt
Counterterrorism and Cybersecurity: Total Information Awareness (2nd Edition), 2015

Bill Whittle's speech https://vimeo.com/55934224 at the David Horowitz Freedom Center's 2012 Restoration Weekend on Nov. 15-18, 2012.
2010s

1860s, A Short Autobiography (1860)
Context: Mr. Lincoln's reasons for the opinion expressed by this vote were briefly that the President had sent General Taylor into an inhabited part of the country belonging to Mexico, and not to the United States, and thereby had provoked the first act of hostility, in fact the commencement of the war; that the place, being the country bordering on the east bank of the Rio Grande, was inhabited by native Mexicans born there under the Mexican Government, and had never submitted to, nor been conquered by, Texas or the United States, nor transferred to either by treaty; that although Texas claimed the Rio Grande as her boundary, Mexico had never recognized it, and neither Texas nor the United States had ever enforced it; that there was a broad desert between that and the country over which Texas had actual control; that the country where hostilities commenced, having once belonged to Mexico, must remain so until it was somehow legally transferred, which had never been done.
Mr. Lincoln thought the act of sending an armed force among the Mexicans was unnecessary, inasmuch as Mexico was in no way molesting or menacing the United States or the people thereof; and that it was unconstitutional, because the power of levying war is vested in Congress, and not in the President. He thought the principal motive for the act was to divert public attention from the surrender of "Fifty-four, forty, or fight" to Great Britain, on the Oregon boundary question.