Complex sentence: He was then Maine Attorney General from 1834 until 1838, when he was elected as a Democrat to the 26th and 27th Congresses, serving March 4,1839 through March 3,1843, and representing the Second and then the Third District.
Split into simpler sentences: He was then Maine Attorney General from 1834 until 1838, when he entered national politics. Clifford was elected as a Democrat to the 26th and 27th Congresses, serving March 4,1839 through March 3,1843, and representing the Second and then the Third District.