Answer:
consequences of forcing a “popular referendum on the race issue”.
Step-by-step explanation:
When Pauli Murray challenged the constitutionality of University of North Carolina for rejecting her admission's application, Frank Graham, the UNC system president, reminded her in letters about the consequences of forcing a “popular referendum on the race issue”.
Frank also explained the challenges he was facing and how it would take more time to make a gradual progress for such provisions in the UNC system. However, he also warned her that hasty and impulsive actions would have darker consequences like Lloyd Gaines citing the Gaines case.