Complex sentence: He ran again in 1846, was elected Governor by defeating Peter F. Causey, the Whig Party candidate, and served from January 19,1847 until January 21,1851.
Split into simpler sentences: He ran again in 1846, and was elected by defeating Peter F. Causey, the Whig Party candidate. He served as Governor from January 19,1847 until January 21,1851.