With more than 600 main post offices and 18, 000 sub-post offices handling 20 billion letters a year, the service has not only deep roots but strong allies.

ECONOMIST: Post Office

When I review institutional portfolios, I regularly request, receive and review non-public SEC deficiency letters of firms handling client assets.

FORBES: SEC Conceals Far More Crime Than You Ever Imagined

He wrote several letters to Congress last year over questions about the agency's procedure for handling tax-exemption applications.

BBC: Obama: Extra tax scrutiny for conservatives 'outrageous'