The excerpt shows the systematic disenfranchisement of Black Americans by the stealing of their votes and the presence of illegitimate representatives in the government.
The detail from the paragraph that best supports the conclusion that the American government is denying the Black community their political rights is:
'Step by step the defenders of the rights of American citizens have retreated. The work of stealing the black man's ballot has progressed and the fifty and more representatives of stolen votes still sit in the nation's capital.'
This excerpt highlights the systematic disenfranchisement of Black Americans through the stealing of their votes and the presence of illegitimate representatives in the government, demonstrating a clear denial of political rights.
https://brainly.com/question/37912642