According to Lawrence O'donnell...
~snip~ There are plenty of odd couple Congressmen who have roomed together on Capitol Hill, but I have never heard of a chief of staff who rooms with his boss. It is beyond unusual. But it must have its advantages. Anything they forget to tell each other at the office, they have until bedtime to catch up on. And then there's breakfast for anything they forgot to tell each other before falling asleep. And then there's all day at the office. Hastert and Palmer are together more than any other co-workers in the Congress.
http://www.huffingtonpost.com/lawrence-odonnell/who-is-scott-palmer_b_31171.html