So now what does Obama do?
If he keeps Holder, the pressure to reveal what he's hiding, including possible illegal activity, will lead to much more than distraction. That won't end well.
If he get's rid of Holder, the new sheriff will have a job of cleaning house. This will expose executive weakness at best. At the worst, investigation may lead to oppressive misuse of power by several members of the administration, which will not only discredit Obama, it may lead to his impeachment and the damning of the Democratic Party for their foolishness is promoting the man that led to the problems.
It's a conundrum and you can see the administration start to squirm. There's a strong effort to change the subject, which isn't working. Many in the media are outraged and they're digging for answers.
I don't think many in the media will like what they find. Not only have they now become political enemies, they share the responsibility of placing Obama in power. They thought they were insulated, but now find they're first to go. They have too much power and this administration wants to make sure they don't use it.