See WHIG.
1856. Have they offered us one of my colleagues [Mr. Caruthers], an old-line Whig? Mr. Kennett of Missouri, House of Repr., Jan. 9: Cong. Globe, p. 180.
1860. As he is an old-line Whig, and not an American or a Know Nothing, I am proud to give him my vote.Mr. Logan of Ind., the same, Jan. 27: id., p. 614.