during the war, nine hundred people became legally free. With slavery abolished, the Fugitive Slave Clause remained in place but became largely moot. Native American territory Despite being rendered unconstitutional, slavery continued in areas under the jurisdiction of Native American tribes beyond ratification. The federal government negotiated new treaties with the "Five Civilized Tribes" in 1866, in which they agreed to end slavery. Electoral changes The Three-Fifths Compromise in the original Constitution counted, for purposes of allocating taxes and seats in the House of Representatives, all "free persons", three-fifths of "other persons" (i.e., slaves) and excluded untaxed Native Americans. The freeing of all slaves made the three-fifths clause moot. Compared to the pre-war system, it also had the effect of increasing the political power of former slave-holding states by increasing their share of seats in the House of Representatives, and consequently their share in the Electoral College (where the number of a state's electoral votes, under Article II of the United States Constitution, is tied to the size of its congressional delegation). Even as the Thirteenth Amendment was working its way through the ratification process, Republicans in Congress grew increasingly concerned about the potential for there to be a large increase in the congressional representation of the Democratic-dominated Southern states. Because the full population of freed slaves would be counted rather than three-fifths, the Southern states would dramatically increase their power in the population-based House of Representatives. Republicans hoped to offset this advantage by attracting and protecting votes of the newly enfranchised black population. They would eventually attempt to address this issue in section 2 of the Fourteenth Amendment. Political and economic change in the South Southern culture remained deeply racist, and those blacks who remained faced a dangerous situation. J. J. Gries reported to the Joint Committee on Reconstruction: "There is a kind of innate feeling, a lingering hope among many in the South that slavery will be regalvanized in some shape or other. They tried by their laws to make a worse slavery than there was before, for the freedman has not the protection which the master from interest gave him before." W. E. B. Du Bois wrote in 1935: Slavery was not abolished even after the Thirteenth Amendment. There were four million freedmen and most of them on the same plantation, doing the same work they did before emancipation, except as their work had been interrupted and