What roles are Obama and Jarrett playing in Spygate?

At American Thinker, Daniel John Sobieski writes about Spygate,

This scandal did not occur in a vacuum any more than did the weaponizing of the IRS to target the Tea Party and other conservative groups before Obama's 2012 re-election campaign occurred in a vacuum. The agencies under Obama's control have been politicized before and used to intimidate and destroy his political opponents.

...National Review contributing editor Andrew McCarthy has long argued that Obama was the ringleader in obstructing justice in the Hillary email investigation

McCarthy wrote at National Review,

From the first, these columns have argued that the whitewash of the Hillary Clinton-emails caper was President Barack Obama's call – not the FBI's, and not the Justice Department's[.] ... The decision was inevitable. Obama, using a pseudonymous email account, had repeatedly communicated with Secretary Clinton over her private, non-secure email account.

If Clinton had been charged, Obama's culpable involvement would have been patent. In any prosecution of Clinton, the Clinton-Obama emails would have been in the spotlight. For the prosecution, they would be more proof of willful (or, if you prefer, grossly negligent) mishandling of intelligence. More significantly, for Clinton's defense, they would show that Obama was complicit in Clinton's conduct yet faced no criminal charges.

Sobieski cautions us not to forget Valerie Jarrett's role:

Valerie Jarrett's hold over President Obama is as mysterious as it has proven dangerous. She is Obama's Rasputin and will have great influence as the former community organizer wages guerrilla warfare from his Washington, D.C. bunker, an operation that includes Spygate.