A former top U.N. official in Afghanistan suggested this morning that Afghan President Hamid Karzai is mentally unstable and uses drugs.

Appearing on MSNBC's Daily Rundown, Peter Galbriath, the former deputy U.N. envoy to Afghanistan, said Karzai's repeated anti-western statements "raises questions about his mental stability."

"He's known to be very emotional," Galbraith said.

The former diplomat then raised the stakes, suggesting Karzai uses drugs.

"In fact some of the palace insiders say that he has a certain fondness for some of Afghanistan's most profitable exports," Galbraith said, referring to the poppy plant that is used to make opiates.

An understandably surprised Chuck Todd asked for clarification: "So you're saying he's got his own substance abuse problem?"

"There are reports to that effect," Galbraith replied.

Galbraith was fired from his position as deputy U.N. envoy  to the country in September after he pushed for a full recount of Karzai's controversial re-election campaign.

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