Wisconsin Republican Sen. Ron Johnson is once again sounding the alarm over big-time threats to U.S. national security posed by past business deals involving Biden family members and China, now that Beijing has been named by the intelligence community and the Pentagon as America’s biggest long-term threat.

Johnson, the former chairman of the Senate Homeland Security and Governmental Affairs Committee who, along with GOP colleague Sen. Chuck Grassley of Iowa, has spent a great deal of time investigating Biden-China links, told the John Solomon Reports podcast Friday that one case, in particular, involving Chinese businessman Patrick Ho chi-Ping really underscores the “enormous blackmail” threat.

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