What caused President Lincoln to replace his secretary of war Simon Cameron in 1862?

President Lincoln's first secretary of war was Republican Simon Cameron of Pennsylvania. Cameron was charged with mismanagement and corruption while in office. With that said, most historians believe President Lincoln replaced Cameron because he joined with the Radical Republicans on the issue of slavery. Cameron distributed a report about arming former slaves. This was unacceptable to Lincoln. In early 1862, Lincoln replaced Cameron with Edwin M. Stanton as the secretary of war. Cameron