Radical Republicans were incensed with Andrew Johnson's veto of the Civil Rights Act of 1866.
The Civil Rights Act of 1866:
- was passed to protect the recently freed enslaved people
- was vetoed by Andrew Johnson who was a Southerner and wanted the Southern States to do what they wanted with the newly freed Black Americans
- was passed into law when Congress overruled Andrew Johnson with a two-thirds majority.
The Civil Rights Act was used to protect Black Americans in the U.S. until the Fourteenth Amendment made it more permanent.
In conclusion, the Radical Republicans were so angered by Andrew Johnson's refusal to make the Civil Rights Act law that they overruled him and passed it anyway.
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