“When you say "radical right" today, I think of these moneymaking ventures by fellows like Pat Robertson and others who are trying to take the Republican Party away from the Republican Party, and make a religious organization out of it. If that ever happens, kiss politics goodbye.”

Speech to the Virginia Convention (1861)
Context: These are pregnant statements; they avow a sentiment, a political principle of action, a sentiment of hatred to slavery as extreme as hatred can exist. The political principle here avowed is, that his action against slavery is not to be restrained by the Constitution of the United States, as interpreted by the Supreme Court of the United States. I say, if you can find any degree of hatred greater than that, I should like to see it. This is the sentiment of the chosen leader of the Black Republican party; and can you doubt that it is not entertained by every solitary member of that same party? You cannot, I think. He is a representative man; his sentiments are the sentiments of his party; his principles of political action are the principles of political action of his party. I say, then; it is true, at least, that the Republican party of the North hates slavery.

Speech: “I Speak to You as an American Citizen” speech, Oct. 1, 1870, Douglas Papers, ser. I, 4:275
1870s

a serious danger to the society, as he points out.
Quotes 2010s, 2013, Speech at DW Global Media Forum

2016, Interview with CNBC's John Harwood (August 22, 2016)

Source: The New Canada (1992), Chapter Twelve, Expanding the Base, p. 222

Reported as unverified in Respectfully Quoted: A Dictionary of Quotations (1989).
Disputed

Source: Hardball with Chris Matthews, 11 February 2005

1938 radio broadcast from New York City marking Abraham Lincoln's birthday, quoted in Vermont Today, Vermont's Great Moments of the 20th Century http://www.vermonttoday.com/century/topstories/gaiken.htm

Address at Virginia Beach (2000), as quoted in The Washington Post http://www.washingtonpost.com/wp-srv/aponline/20000228/aponline165646_000.htm (28 February 2000). <br class="br">2000s