WASHINGTON — Sen. Chuck Grassley (R-Iowa) is demanding an investigation of US Customs and Border Protection (CBP) officials who allegedly retaliated against whistleblowers who flagged failures to fingerprint potentially dangerous criminal migrants, The Post can exclusively reveal.

The Senate Judiciary Committee chairman fired off a letter Monday to CBP Commissioner Rodney Scott naming and shaming those “bureaucrats” who were promoted even after they sidelined whistleblowers Fred Wynn, Mike Taylor and Mark Jones .

“To ensure that retaliation does not happen again at [Department of Homeland Security], CBP, or any of the Department’s other component agencies, the bureaucrats that retaliated against Mr. Wynn, Mr. Taylor, and Mr. Jones must be held accountable,” Grassley told Scott.

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