从哥伦比亚移民的参议员莫雷诺正在推出立法，美国公民身份要求“独家效忠”，不拥有其它国籍。 'ALL OR NOTHING': Sen. Bernie Moreno is introducing legislation to end dual citizenship in the U.S., requiring Americans with foreign citizenship to choose one nationality or automatically lose their U.S. citizenship. Moreno, who immigrated from Colombia, says American citizenship demands "exclusive allegiance."