Geraldine Ferraro arrives at the WE Vote '08, a campaign that looks to register over one million women to vote in the 2008 election, held at Tenjune in New York on November 28, 2007. (UPI Photo/Laura Cavanaugh)

Remarks by Wright, Obama's former pastor, forced the presidential candidate to address race relations in a speech that included the Ferraro comparison.

Ferraro, in response, called it "unbelievable" that she would be compared to a man whom she said was "spewing hatred" from the pulpit, CNN reported Friday.

Ferraro, the 1984 Democratic vice presidential nominee, left Sen. Hillary Clinton's presidential campaign after she attributed Obama's success so far in the presidential race largely to the fact that he is black.