A key speech in Lincoln's rise to the head of the Republican Party was the Cooper Union Address on February 27, 1860, shown here in its entirety. Miller noted in Lincoln's Virtues that many prominent Northeast leaders were in attendance including Henry Ward Beecher, who had first invited Lincoln to New York. Lincoln was anxious to impress his fellow Republicans. Herndon noted, "no former effort in the line of speech-making had cost Lincoln so much time and thought as this one." The speech was extremely well-received and published in newspapers throughout the United States.
There are books devoted exclusively to the Cooper Union Address by Harold Holzer and John Corry.