Complex sentence: Docking was elected Governor of Kansas in 1956 and reelected in 1958, making him the first member of the Democratic Party to serve more than a single term as governor in Kansas.
Split into simpler sentences: Docking was elected governor of Kansas in 1956 and reelected in 1958, serving two terms as governor. He was the first member of the Democratic Party to serve more than a single term as governor in Kansas.