Republicans are loath to appear to be against minority enfranchisement, so their arguments against adjustment have focused on statistical and legal technicalities. Their failure to address the question of whether the undercount really hurts minorities has left Republicans in their assigned role as mean-spirited opponents of racial justice. But symbolism can be taken too far. A moment's reflection makes it clear that there is no such thing as a right to be counted. But there is nothing to prevent such citizens from voting or from going out and organizing others to vote.
Numbers are important.
But more important is what people do with them. I don't know. I don't think my colleagues know. What's important politically is not how many there are, but what you do about it. The extent to which you mobilize enormously outweighs the numbers.