Complex sentence: Upon the readmission of Arkansas to representation he was elected as a Republican to the Fortieth Congress and was reelected to the Forty-first Congress, serving from June 22,1868 until March 3,1871.
Split into simpler sentences: Upon the readmission of Arkansas to representation was elected as a Republican to the Fortieth Congress. He was reelected to the Forty-first Congress and served from June 22,1868, until March 3,1871.