Eric Foner: The Civil Rights Act of 1875 is the last major piece ... But the Civil rights Law of 1866, and of course the Fourteenth and Fifteenth Amendments, remain in the Constitution.

The debate today depends on whether, in 1868, foreigners were considered 'subject to the jurisdiction' of the United States. They weren't.

vetoed the Civil Rights Act of 1866 and strongly resisted the passage of the 14th Amendment, which ensured equal rights and protections under the law, and was championed by Republicans.