Which national NFA president resigned?

The correct answer is Oliver Hunter, who served as the national president of the New Farmers of America (NFA). His resignation became notable within the context of the organization’s history. The NFA, which was established to support African American agricultural students, faced various challenges during its existence, and Hunter’s decision to resign highlighted the struggles the organization faced. His leadership was part of a significant period during which the NFA worked towards the advancement of its members, despite the socio-economic difficulties at the time. Understanding Hunter's contributions and the circumstances surrounding his resignation provides insight into the complexities of agricultural education and leadership within the context of the NFA and its eventual merging with the Future Farmers of America (FFA).

Other figures mentioned, such as James Hughes, William Carter, and George Washington, did not hold the position of NFA president or did not have any significant resignations documented in the same way as Hunter. Each of these individuals has their own historical significance, but it is Oliver Hunter's resignation that stands out in relation to the NFA's leadership narrative.