What difference would that make in this case? It does not matter if you put the Clintons under oath. They commit perjury and never get prosecuted.
Why has no one asked Comey yet if there is still an ongoing investigation into the Clinton Foundation?
This makes the FBI look like fools
And no one is going to jump ship
This also makes Hillary look bad to the average person who is not a diehard Democrat
Forget the Clintons for the moment. What this does is call into question Comey's, and the FBI's credibility (which was allegedly beyond reproach).
The FBI was either careless, or intentional in not putting her under oath or recording the "interview."
Not good for the "straight shooter" Comey. He should resign in shame.