He was editor of the
Keokuk Daily Gate City in
Keokuk, Iowa, for 31 years. He served as delegate to the Republican National Conventions in 1872, 1876, and 1880. He was appointed commissioner of education to the
Paris Exposition in 1889. He served as Keokuk's Postmaster from 1879 to 1885. He was a member of the Keokuk Board of Education from 1879 to 1894, and served as the Board's president from 1882 until 1894. In 1894, Clark was elected as a Republican to represent Iowa's 1st congressional district (in southeastern Iowa) in the
Fifty-fourth Congress. He replaced
John H. Gear, whom the Iowa General Assembly had chosen to serve as a U.S. Senator. Two years later Clark won re-election, and served in the
Fifty-fifth Congress. He was not a candidate for renomination in 1898. In all, he served in Congress from March 4, 1895, to March 3, 1899. After returning to Iowa, he resumed his editorial duties in Keokuk. ==Death==