Her sire, Amerigo, a son of the great Nearco, was a stakes winner of races in England and the United States including the Coventry Stakes, New York Handicap and the San Juan Capistrano Handicap.
Her dam was Morn Again, a daughter of Calumet Farm's multiple stakes winner Sun Again.
When Politely, trained by George Baker, raced at age three, her best outing was a third to 1965 American Horse of the Year Moccasin in the 1966 Test Stakes.
At ages four and five, she was one of the top fillies in the United States, scoring back-to-back wins in three important stakes races, which included equalling and breaking the Monmouth Park track record in the Matchmaker Stakes.
She was bred to top stallions such as Hoist The Flag, Dr. Fager, Alydar, The Minstrel, Smarten and Northern Dancer, but her offspring met with limited racing success.