There are new allegations of potential witness tampering and obstruction of justice over Gov. Cuomo's handling of the Moreland Commission.

According to the New York Times, U.S. Attorney Preet Bharara sent a letter yesterday threatening to open an investigation. Bharara is concerned that Cuomo's administration may have pressured commission members to issue public statements of support. Bharara says those actions could amount to obstruction of justice or tampering with witness charges.

Cuomo has been referring to statements of support from commission members as proof he allowed them to act independently. One member was Rockland County District Attorney Thomas Zugibe, who spoke in support of Cuomo Monday, when just four days earlier he had declined to comment on the matter.

Cuomo himself created the commission last year to investigate corruption in Albany, but quickly disbanded it a few months ago. Bharara is now investigating Cuomo's involvement, and looking into whether his staff pushed the commission to stop subpoenas to groups with ties to the governor.

Cuomo's office released a statement Thursday saying they are aware of Bharara's letter. They admit to speaking to commission members, but they say they only did to correct what they considered numerous inaccuracies with published reports.