Current delegation
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John Boozman (R)
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Tom Cotton (R)
Arkansas was admitted to the Union on June 15, 1836, and elects its senators to class 2 and class 3. Arkansas's Senate seats were declared vacant in July 1861, due to its secession from the Union. They were again filled from June 1868. Its current senators are Republicans John Boozman and Tom Cotton. John L. McClellan was Arkansas's longest-serving senator (1943–1977).