In the case of McLeod, Regional Director, National Labor Relations Board v. General Electric Co. et al., 1966, the Supreme Court ruled in favor of General Electric (GE). The dispute arose when GE refused to bargain with a union that represented only part of its employees at one location because it had an established policy to negotiate only with unions representing all workers at a single site. The National Labor Relations Board (NLRB) ordered GE to bargain with the smaller union and sought enforcement from federal courts when GE refused. However, both lower courts denied enforcement on grounds that NLRB's order was not appropriate under circumstances where employer’s refusal was based on legitimate and longstanding bargaining policy rather than anti-union bias. The Supreme Court affirmed these decisions stating that while NLRA requires employers to bargain collectively with representatives chosen by their employees; it does not compel either party to agree upon any particular terms or conditions nor does it mandate what unit should be used for collective bargaining purposes unless there is evidence showing employer’s refusal undermines free choice or labor relations stability.

In the dissenting opinion for McLeod v. General Electric Co., Justice Harlan argued that the majority's decision was a departure from established principles of federalism and labor law. He contended that state courts should have jurisdiction over cases involving unfair labor practices, as long as they do not conflict with federal law or undermine national policy. According to him, this approach would respect states' rights while still ensuring uniformity in labor relations across the country. Furthermore, he criticized the majority for failing to provide clear guidance on when state court jurisdiction is preempted by federal law, which could lead to confusion and inconsistency in future cases. Lastly, he disagreed with their interpretation of Section 8(b)(1)(A) of the National Labor Relations Act (NLRA), asserting that it does not prohibit peaceful picketing aimed at persuading employees to join a union.