Did the HUD Secretary persecute Philly on behalf of a developer friend?

The Washington Post suggests so:

After Philadelphia's housing director refused a demand by President Bush's housing secretary to transfer a piece of city property to a business friend, two top political appointees at the department exchanged e-mails discussing the pain they could cause the Philadelphia director.

"Would you like me to make his life less happy? If so, how?" Orlando J. Cabrera, then-assistant secretary at the U.S. Department of Housing and Urban Development, wrote about Philadelphia housing director Carl R. Greene.

"Take away all of his Federal dollars?" responded Kim Kendrick, an assistant secretary who oversaw accessible housing. She typed symbols for a smiley-face, ":-D," at the end of her January 2007 note.

Cabrera wrote back a few minutes later: "Let me look into that possibility."

The e-mails, obtained by The Washington Post, came to light as a result of a lawsuit provoked by HUD's decision last September to strip the Philadelphia Housing Authority of as much as $50 million in federal funds. In December, it declared the agency in violation of rules that underpin its ability to decide precisely how it will spend federal housing funds. Kendrick was the official who formally notified the authority that she had found it in violation.

The emails could be a joke--it does sound like the sort of thing I've joked about from time to time. But that doesn't answer the question of what the hell the HUD secretary was doing demanding that the city of Philadelphia transfer property to a friend.