From The Atlantic:

"... If his political adversaries knew Tsvangirai secretly supported the sanctions, deeply unpopular with Zimbabweans, they would have a powerful weapon to attack and discredit the democratic reformer.

Later that day, the U.S. embassy in Zimbabwe dutifully reported the details of the meeting to Washington in a confidential U.S. State Department diplomatic cable. And slightly less than one year later, WikiLeaks released it to the world.

The reaction in Zimbabwe was swift. Zimbabwe's Mugabe-appointed attorney general announced he was investigating the Prime Minister on treason charges based exclusively on the contents of the leaked cable. ..."