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No less remarkable was Mercer's career as U.S. Congressman for northern Virginia. A key figure in the rise of Virginia's Whig Party, he is best remembered as the chief promoter of the Chesapeake and Ohio Canal, first president of the C&O Canal Company, and chairman of the Roads and Canals Committee during the administrations of Jackson and Van Buren. At the age of sixty, Mercer resigned his seat in Congress and moved to Florida, where he became a cashier for the Union Bank of Florida in Tallahassee. He said his long public service had drained his personal finances and had necessitated his finding steady employment. Later he gained an interest in the colonization of the Texas Republic, and in 1841, during one of his seven journeys to Texas, he laid plans for promoting the settlement of Anglo-Americans in northern Texas. After becoming an official empresario for the republic, he organized the Texas Association and arranged for more than 100 families to relocate to Texas. His colony, however, caused controversy around the time of annexation because of Mercer’s firm antislavery sentiments. Although financially strapped, he spent the last six years of his life traveling in Europe. In 1858, he returned to Virginia, where he died at Howard, near Alexandria. He was buried in Union Cemetery, Leesburg, Virginia. He remained a bachelor his entire life. |
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