Democrats blocked the first attempt to ratify the 13th Amendment (abolishing slavery) in 1863Democrats unanimously voted against the 14th Amendment giving former slaves citizenshipDemocrats unanimously voted against the 15th Amendment giving former slaves the right to voteDemocrats form the Klu Klux Klan 1865Democrats instituted Jim Crow laws across Democrat led states, preventing African American’s right to vote.Democrats held the longest filibuster in U.S Senate history to block the civil rights act 1957Democrats refused to take up the Senate bill on police reform… June 2020President Abraham Lincoln (The first Republican President) abolished slavery.