"During the Civil War, one of the nation's leading abolitionists was Republican Senator Henry Wilson, of Massachusetts, who would later serve as vice president during President Grant's second term. In December 1861, Mr. Wilson introduced a bill to abolish slavery in the District. The measure met with parliamentary obstacles from the adamantly pro-slavery Democratic Party, whom Republicans in those days referred to as the 'Slave-ocrats'. Most Democrats in Congress having resigned in order to join the Confederate rebellion, Wilson's measure sailed through the Senate. The abolitionist senator responsible for outmaneuvering Democrat opposition was Ben Wade, the Ohio Republican who six years later would have assumed the presidency had the bitterly racist Democratic President, Andrew Johnson, been convicted during his impeachment trial. In the House of Representatives, Democrats delayed passage with a series of stalling tactics. Finally, the majority leader, Thaddeus Stevens, bulldozed over Democrat opposition by calling the House into a committee of the whole. He stopped all other business in the House until Democrats relented and allowed a vote on the bill. Stevens, of Pennsylvania, is best known for his 'forty acres and a mule' proposal. Overall, 99 percent of Republicans in Congress voted to free the slaves in the District of Columbia, and 83 percent of Democrats voted to keep them in chains."