Tendai Biti, the secretary general of the opposition Movement for Democratic Change, protested the government’s decision to delay the presidential runoff up to 90 days. By law, the election — pitting Morgan Tsvangirai, of the opposition, against President Robert Mugabe — was supposed to take place by May 23, or 21 days after results were announced for the first round of voting. The delay, he said, allows the government to continue a campaign of violence that the opposition says has claimed at least 32 lives, including, on Tuesday, two founding members of the party’s youth assembly.