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.
Republican State Committee of Delaware
The Republican State Committee of Delaware got its start in the mid-1800s when the American Party (a group dedicated to prohibition of alcohol), People's Party, and former Whigs reformed under the Union Party. This party was dedicated to preserve the Union in the time of Lincoln's election. While Delaware did not secede from the Union, Delaware Democrats and other supporters often opposed Lincoln's policies. The Republican party struggled to gain control in the state from 1865 to 1898 with the Democratic Party maintaining control of both the federal and state level of government. However, changes in industry and the arrival of immigrants in key locations would soon spell the rise of the Republican party in Delaware.