This article is a stub. You can help the House of Cards Wiki by expanding it. Calvin T. Underwood (1935-1978) was the father of Frank Underwood. He is seen in season four to have links to the KKK (Ku Klux Klan). Retrieved from "https://houseofcards.fandom.com/wiki/Calvin_T._Underwood?oldid=15208" Categories: Article stubs Americans Males Peach Farmers Residents of Gaffney Underwoods Unnamed and Unseen Characters 1935 births 1978 deaths Community content is available under CC-BY-SA unless otherwise noted.