The Pennsylvania gubernatorial election of 1966 was held on November 8. Republican Ray Shafer, the state's incumbent Lieutenant Governor, was elected to the state's highest office after holding off a charge from future governor Milton Shapp. A wealthy electronics executive, Shapp used his own money to score an upset in the Democratic primary over the party establishment's choice, Bob Casey (who would also go on to become governor). Shapp ran a spirited campaign, where he tagged himself as a "man against the machine," but the ambivalence of party leaders toward his renegade candidacy may have ultimately led to his defeat; has campaign was also hurt by fierce opposition from the Philadelphia media, over Shapp's personal involvement in attempting to stop the buyout of the Pennsylvania Railroad.