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Connecticut became a state on January 9, 1788, the fifth state to join the Union. Connecticut's first two senators, Oliver Ellsworth and William Johnson, took office on March 4, 1789. Connecticut's longest-serving senators include Orville Platte (1879-1905) and Christopher Dodd (1981-2011). Among those who rose to leadership positions were Lafayette Foster and Frank Brandegee, both of whom served as the Senate's president pro tempore.

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