Massachusetts Republican Party
The Massachusetts Republican Party was founded in 1854. Drawing together abolitionist and nativist anti-Catholic elements, it quickly became the dominant political force in the state and a powerful arm of the national Republican Party. Significant founding figures include Senator Charles Sumner, formerly of the Free Soil Party, and Speaker of the House Nathaniel Prentiss Banks, formerly of the American Party. 
At the time of the Republican Party's founding in 1854, all of Massachusetts's congressional representatives but Sumner were members of the nativist Know-Nothing Party. However, Banks's role as chairman of the 1856 Republican National Convention, his active support for the Republican presidential nominee John C. Frémont in 1856 and his focus on anti-slavery legislation as Speaker put him at odds with his party. Following the Democratic victory in the 1856 elections and the Dred Scott case in 1857, the national American Party organization collapsed, and most Northern members joined the nascent Republicans. In 1857, Banks ran as a Republican against incumbent Know-Nothing Governor Henry J. Gardner and won a decisive victory.
History of the United States (1789–1849)
The First Party System between 1792 and 1824 featured two national parties competing for control of the presidency, Congress, and the states: the Federalist Party was created by Alexander Hamilton and was dominant to 1800. The rival Republican Party (Democratic-Republican Party) was created by Thomas Jefferson and James Madison, and was dominant after 1800. Both parties originated in national politics but moved to organize supporters and voters in every state. These comprised "probably the first modern party system in the world" because they were based on voters, not factions of aristocrats at court or parliament. The Federalists appealed to the business community, the Republicans to the planters and farmers. By 1796, politics in every state was nearly monopolized by the two parties.