What this is saying is that if a state denies (black) citizens a vote in national elections, the number of representatives will be reduced in proportion to the whole state. It doesn’t directly address illegal aliens voting. It does provide for action if voting rights are withheld from citizens. It should not be much of a stretch to show application to illegal aliens counted in the Census versus citizens voting in elections. and so the need to define who our citizens are necessitates the question on the Census.
ML/NJ