Why new acting AG?

I couldn't figure why Bush appointed Peter Keisler, as acting Attorney General yesterday. What was wrong with continuing with Clement? Oh, you didn't know we have an new acting AG. That's because it was not reported in any MSM story I read and I read 2 print newspapers and news on the web daily. The reason that is being speculated for the change is that we are in the middle of a crisis for telecom giants re their illegal participation in NSA surveillance post 9/11. They have potential liability from every single American. Rather a big class action suit. Keisler is a former attorney for ATT who is famous in other work for the Justice Dept for insisting on weakening the case against big tobacco. Remember that? Get the picture now?