If Obama decides to stick with Hillary, what he might do to drag out the FBI inquiry until after the election is to fire Comey...not over the email investigation but by claiming that he is guilty of racism because of disagreements with the White House over the rise in crime since the Ferguson riots. (Unlike Obama, Comey doesn’t seem to be in favor of anti-police violence or Black Lives Matter activism.)
Obama has no control over the FBI inquiry. That’s been obvious long into last year. There’s a war between the White House/Clinton camp including the media against the FBI. While the media has been somewhat successful in obfuscating the email issue, they haven’t nullified the FBI’s leaks.
Comey’s recent presser wiped out all of the Clinton camp’ attaboys in one fell swoop. The announcement of the plea deal with Guccifer was the coup de grace in many respects. It put the Clinton camp on notice that the email server was compromised and the FBI has proof. That obliterated Hillary’s “What doe it matter?” excuse.
It’s going to be a miserable summer for Hillary.