Andrew Johnson

http://americanhistory.si.edu/presidency/timeline/pres_era/3_678.html

http://americanhistory.si.edu/presidency/2c3.html#2

http://americanhistory.si.edu/presidency/timeline/pres_era/3_656.html

RADICAL REPUBLICANS:

http://en.wikipedia.org/wiki/Radical_Republican_(USA)