Durbin asked Roberts this month to open an investigation into Thomas over what Democrats say is his “misconduct” that was detailed in a ProPublica report.
The liberal news outlet's report accused Thomas of improperly receiving lavish vacations from Republican mega donor Harlan Crow, which reportedly included taking trips across the world on Crow's yacht and private jet without disclosing them.
Expert have dismissed the ProPublica report as political hit piece and explained that justices are permitted to accept invites to properties of friends for dinner or vacations without paying for it or disclosing it.
Thomas released a rare statement following the report saying that he has consistently followed ethics guidelines.