Who is Mark Halperin?

I had never heard of him before his sweet little memo. Here's an interesting article about him.

During the 1992 campaign, Halperin violated journalistic ethics by providing...Stephanopoulos a copy ABC had obtained of Mr. Clinton’s youthful “I loathe the military” letter...according to Tom Rosenstiel’s book about ABC Strange Bedfellows. Halperin thereby gave candidate Clinton days of advance warning to prepare his response before facing reporters’ questions about this letter Clinton had no reason to believe still existed.

Having helped Clinton win, Mark Halperin then covered the President-elect’s transition to power and “was assigned to White House coverage for the first two years of the Clinton administration.”

Apparently it bothered neither ABC nor Halperin that this network’s White House reporter was the son of high-level Clinton appointee and...presidential advisor Morton Halperin. In 1997, the same year Mark Halperin was promoted to Political Director of ABC News, his brother David began a four-year stint as speechwriter to President Clinton.

...ABC never notified its audience that its reporter Mark Halperin was covering a Clinton White House that employed two members of his immediate family.

And no one called them on this? No wonder Halperin thinks he can do as he pleases.