Grassley also wants to know whether McCabes involvement in the probe raises the appearance a conflict of interest in light of his wifes ties with Clintons associates and whether it would merit McCabe recusing himself from the investigation.
Grassley was referring to McCabes wife having accepted $700,000 in political contributions facilitated by Hillary Clinton ally Terry McAuliffe, the Virginia governor, for her state Senate run.
Grassley noted McCabe already is being looked at by the inspector general for his involvement in the Clinton email investigation, despite his wife's ties.
While Mr. McCabe recused himself from public corruption cases in Virginia presumably including the reportedly ongoing investigation of Mr. McAuliffe regarding illegal campaign contributions he failed to recuse himself from the Clinton email investigation, despite the appearance of a conflict created by his wifes campaign accepting $700,000 from a close Clinton associate during the investigation.