1851 United States Senate election in Massachusetts
The 1851 United States Senate election in Massachusetts was held during January 1851. Free Soil Party candidate Charles Sumner was elected by a coalition of Free-Soil and Democratic legislators over Whig incumbent Robert C. Winthrop, who had been appointed to finish the term of retiring Senator Daniel Webster. At the time, Massachusetts elected United States senators by a majority vote of each separate house of the Massachusetts General Court, the House and the Senate. Background Democratic-Free Soil coalition At the time, Massachusetts elected governors by a majority of the popular vote. If no candidate received a majority, the election was decided by a vote of the General Court. In 1850, the Massachusetts electorate split between three major parties: the Whigs, the Democrats, and the anti-slavery Free Soil Party. To overcome the much larger Whig Party, the Democrats and Free-Soilers entered a coalition. Under their power-sharing agreement, the state Democratic Party adopted an anti-slavery platform. Democrats George S. Boutwell and Nathaniel Prentiss Banks would be elected Governor and Speaker of the House, respectively. Free Soil leader Henry Wilson was elected Senate President. Finally, abolitionist activist Charles Sumner would be elected to the United States Senate in the January election. Legislative composition