(CNN) A Justice Department review of business dealings tied to Hillary Clinton -- championed by President Donald Trump and his allies -- has wound down with officials not finding enough evidence to recommend the formal opening of a criminal investigation, according to current and former US officials.

The Justice Department has not formally closed the review, which was led by US Attorney John Huber of Utah , the officials told CNN.

declined to comment. The Department of Justice also declined to comment to A spokeswoman for Huber deferred comment to the Justice Department's spokeswoman, whodeclined to comment. The Department of Justice also declined to comment to the Washington Post, which first reported that Huber's review had essentially come to an end.

The probe, which launched in November 2017 under then-Attorney General Jeff Sessions, was given momentum by Trump and conservatives on Capitol Hill who pushed for greater scrutiny of the former Democratic presidential nominee.

Huber was said to be examining allegations that donors to the Clinton Foundation had been given special treatment by Clinton when she served as secretary of state in the first half of the Obama administration.

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