A series of campaign finance rulings, most notably the Supreme Court’s 2010 Citizens United decision, set off a sea change in how electoral politics are funded in the United States. The result is an evolutionary break that disrupted the campaign finance environment in ways that allowed a new species of organization, the super PAC, to thrive. Other traditional campaign finance organizations, such as political parties and political action committees, have not adapted as well and now play a reduced role relative to the new “super species.”

中文翻译：

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超级PAC的起源和演变：运动财务物种的达尔文式检验

一系列竞选财务裁决，特别是最高法院2010年公民联合会的裁决，掀起了美国选举政治经费筹措方式的巨变。结果是进化上的突破，破坏了竞选财务环境，使新的组织超级PAC蓬勃发展。政党和政治行动委员会等其他传统的竞选财务组织也没有适应，现在相对于新的“超级物种”而言，其作用正在减弱。