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 Republican Party
From its inception in 1854 to 1964, when Senate Republicans pushed hard for passage of the Civil Rights Act of 1964 against a filibuster by Senate Democrats, the GOP had a reputation for supporting blacks and minorities. In 1869, the Republican-controlled legislature in Wyoming Territory and its Republican governor John Allen Campbell made it the first jurisdiction to grant voting rights to women. In 1875, California swore in the first Hispanic governor, Republican Romualdo Pacheco. In 1916, Jeannette Rankin of Montana became the first woman in Congress—and indeed the first woman in any high level government position. In 1928, New Mexico elected the first Hispanic U.S. Senator, Republican Octaviano Larrazolo. In 1898, the first Jewish U.S. Senator elected from outside of the former Confederacy was Republican Joseph Simon of Oregon. In 1924, the first Jewish woman elected to the U.S. House of Representatives was Republican Florence Kahn of California. In 1928, the Republican U.S. Senate Majority Leader, Charles Curtis of Kansas, who grew up on the Kaw Indian reservation, became the first person of significant non-European ancestry to be elected to national office, as Vice President of the United States for Herbert Hoover.