 In 1844 he moved to Keosauqua, a settlement in the southeast area of what was then Iowa Territory, and later the state of Iowa when Iowa was admitted to the Union in 1846.In 1852 he was chosen by the Democrats as one of the presidential electors and cast his vote for Franklin Pierce, who had carried Iowa.In 1854, Hall was elected as a Democrat to represent Iowa's 1st congressional district in the U.S. House, defeating Whig candidate R. L. B. Clark.