Salmon P. Chase
Salmon Portland Chase (January 13, 1808 – May 7, 1873) was an American politician and jurist who served as U.S. Senator from Ohio and the 23rd Governor of Ohio[citation needed]; as U.S. Treasury Secretary under President Abraham Lincoln; and as the sixth Chief Justice of the United States. Chase articulated the "slave power conspiracy" thesis, devoting his energies to the destruction of what he considered the Slave Power[citation needed]—the conspiracy of Southern slave owners to seize control of the federal government and block the progress of liberty. He coined the slogan of the Free Soil Party, "Free Soil, Free Labor, Free Men". Chief Justice Chase presided over the Senate trial of Andrew Johnson during the President's impeachment proceedings in 1868.