Revovling Whitehouse Doors

Every week, it seems, there's a small post (like this one) at the whitehouse web location describing more appointments made by W to fill vacant seats in his administration. I have three questions: 1) Who are the people he finds to replace the vacancies? 2) Why are the people resigning so frequently? 3) What stories might these exiting folks tell about what's wrong with the government du jour?

John G. Emling, of Pennsylvania, to be An Assistant Secretary of Commerce, vice Brett T. Palmer, resigned.

Timothy Anthony Junker, of Iowa, to be United States Marshal for the Northern District of Iowa for the term of four years, vice John Edward Quinn.

Patrick Carroll Smith, Sr., of Maryland, to be United States Marshal for the Western District of North Carolina for the term of four years, vice Gregory Allyn Forest, resigned.

William Ludwig Wehrum, Jr., of Tennessee, to be an Assistant Administrator of the Environmental Protection Agency, vice Jeffrey R. Holmstead, resigned.