His comments come after an Operation Black Vote study found the number of seats where black and Asian votes could swing the election result had increased by 70 % since 2010. (politics.co.uk)
But the story is different at state level, especially if another cause of lost black votes is taken into account. (newscientist.com)
Once black voting rights were secured and segregation ended the civil rights movement went into sharp decline. (totalpolitics.com)