As soon as 0bama was inaugurated his AG Eric (the Red) Holder hired only liberal attorney's. It was so bad that good people like Hans A. von Spakovsky, J. Christian Adams and others quit the DOJ.
There are a series of articles by them called 'Every Single One': PJ Media's Investigation of Justice Department Hiring Practices that are excellent that proves just how corrupt 0bama and Holder were in the hiring of DOJ attorneys, they are excellent.
Also, you can enter keywords "voterintimidation" or "newblackspanthers" and scroll back to 2009 and 2010 articles for a case where Holders's DOJ ignored the law and dismissed a case that J. Christian Adams and others were prosecuting, it was a sure win for the DOJ until Holder chose to dismiss it.