Please answer a question about the following article about Florida:

The first post-Reconstruction era Republican elected to Congress from Florida was William C. Cramer in 1954 from Pinellas County on the Gulf Coast, where demographic changes were underway. In this period, African Americans were still disenfranchised by the state's constitution and discriminatory practices; in the 19th century they had made up most of the Republican Party. Cramer built a different Republican Party in Florida, attracting local white conservatives and transplants from northern and midwestern states. In 1966 Claude R. Kirk, Jr. was elected as the first post-Reconstruction Republican governor, in an upset election. In 1968 Edward J. Gurney, also a white conservative, was elected as the state's first post-reconstruction Republican US Senator. In 1970 Democrats took the governorship and the open US Senate seat, and maintained dominance for years.

Who was Claude R Kirk
966 Claude R. Kirk, Jr. was elected as the first post-Reconstruction Republican governor, in an upset election