What position did the republican party take on slavery in the 1850s?

The Republican Party as a whole, were against slavery. President Lincoln was a Republican. The Republican party was is the party of the republic, (a republic is the form of government the founders and framers designed), which is the United States. The party was created to give American's that believed in the Constitution a party to stand with. The Constitution is against slavery and so is the republic. The republican party was the first to have an African American and former Slave, Fredrick Douglass, as a vice presidential candidate.