While it is possible to do that, he is already on the way out. His successor has not been named yet but his tour as AG is almost over, and an impeachment of the Attorney General would take longer to organize than he has time left in office.
The thing to focus on is pushing the confirmation hearings for his successor into next year. If (when!) the Dhimmies finally lose control of the Senate, then Obama will play unholy hell trying to get anyone appointed as dog catcher over at Justice, because Harry Reid won't be able to block anything for Obama for the last two years of his Immaculation.
The focus needs to be on electing strong conservatives to Congress and continue the house cleaning on Capital Hill that we all began back in the 2010 Midterms. Things have only gotten worse for Obama in Congress since then, and when he loses the Senate like he lost the House, his games are going to be just about done. Without a willing Congress, he can put that pen and cellphone where the sun don't shine.