Morgan Tsvangirai, the leader of the Zimbabwean opposition, was charged with high treason by President Robert Mugabe's government yesterday: a defiant response to Zimbabwe's suspension from the Commonwealth. Earlier this week the South African president, Thabo Mbeki, and other neighbouring African leaders urged Mr Mugabe not to press the charge, to create a more conciliatory political climate after last week's bitterly contested presidential election. By going ahead with it Mr Mugabe seems to be showing that he is not interested in negotiations with Mr Tsvangirai. Since Mr Mugabe was declared the winner on March 13 he has signed into law...