Who declared that organized resistance by southern states would prevent racial integration in the south?

In the context of racial integration in the South, it was often southern political leaders and segregationists who declared that organized resistance would prevent integration. Prominent figures such as Governor George Wallace of Alabama famously proclaimed his commitment to segregation, stating that he would stand in the schoolhouse door to block integration efforts. These declarations were part of a broader resistance movement against civil rights advancements during the 1950s and 1960s.