The Chinese government espionage campaign that has deeply penetrated more than a dozen U.S. telecommunications companies is the “worst telecom hack in our nation’s history — by far,” a senior U.S. senator told The Washington Post in an interview this week.

Salt Typhoon's breach compromises U.S. telecom giants, including T-Mobile, AT&T, and Verizon. The hack exposes vulnerabilities in U.S. wiretapping systems, threatening national security and potentially the data of millions of Americans. T-Mobile claims limited damage, but the full scope of the breach is still unclear.

A breach of telecoms companies that the United States said was linked to China was the "worst telecom hack in our nation's history - by far", the chairman of the Senate Intelligence Committee told the Washington Post on Thursday.

Mark Warner, a Democrat from Virginia, spoke with the Washington Post and New York Times this week to warn the public that this is so much worse than we initially thought, dubbing it “the worst telecom hack in our nation’s history.