After reading Peter Byrne's article in the East Bay Express about the potential conflicts of interest in the sale of postal facilities by her husband Richard Blum, Ralph Nader has written to Senator Dianne Feinstein to express his concerns.  

Mr. Nader suggests that "to remove all doubt of impropriety, you should: introduce and champion a bill to immediately suspend all sales of postal properties throughout the country; and call for a close examination of the contact between CBRE and the USPS to sell postal properties."  The letter is here.