The story

Calling Zimbabwe's runoff presidential election a "sham," U.S. President George W. Bush said Saturday that he would push for additional sanctions against the country's government.

"I am instructing the secretaries of State and Treasury to develop sanctions against this illegitimate government of Zimbabwe and those who support it," Bush said in a statement.

Zimbabwe held a runoff Friday after presidential elections March 29 including opposition leader Morgan Tsvangirai and longtime President Robert Mugabe failed to yield a clear winner. Read full article »

CNN's Nkepile Mabuse, Hamilton Wende, Ingrid Formanek and David McKenzie contributed to this report.

All About Zimbabwe • Robert Mugabe • Morgan Tsvangirai