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Former Fox News investigative reporter Catherine Herridge is asking the Supreme Court to protect her confidential sources after a federal court ordered her to identify who helped expose a woman's alleged ties to China's military.

The outcome of the case could dramatically reshape the legal protections afforded to journalists working in the U.S. under the First Amendment.

Herridge was held in contempt and ordered to pay $800 per day for refusing to reveal sources behind her 2017 reporting on Yanping Chen, a Chinese American businesswoman who operated a university attended by U.S. military personnel.…