Andrew Johnson
For someone with a relatively high IQ of 138.9, Johnson’s thinking was still immensely backward and racist. Despite the efforts of the White House to impeach him, they failed in removing him from office. His four-year-service as a president (1865-1869) fostered dissatisfaction and disillusionment among the people. The successor of Abraham Lincoln helped the Union but was not so supportive of allowing freed slaves their right to vote. Johnson was the first president to be impeached following his authorization to pursue “black codes” which oppressed newly freed slaves.