In 1871, Clayton was elected to the
Arkansas House of Representatives representing
Jefferson County. In 1873, he served in the
Arkansas Senate representing Jefferson,
Bradley,
Grant and
Lincoln Counties, also serving as
Speaker of the Senate pro tempore for part of his term. He served on the first board of trustees of Arkansas Industrial University, today the
University of Arkansas, when it was chartered in 1871. Two years later, Clayton helped
Pine Bluff, Arkansas, secure the Branch Normal College, today the
University of Arkansas at Pine Bluff. Clayton became involved in the
Brooks-Baxter War of 1874, which was fought over the disputed election for the governor's office between
Joseph Brooks and
Elisha Baxter. Clayton, a supporter of Brooks's, raised troops in Jefferson County and marched them to
Little Rock, Arkansas, where they fought Baxter supporters. He remained loyal to Brooks to the end of the conflict when
President Ulysses S. Grant declared Baxter the rightful governor. Clayton remained involved in
Arkansas politics in the years after
Reconstruction. With the support of
black Republican voters, he became sheriff of Jefferson County in 1876, being reelected to five successive, two-year terms. == Federal election and death ==