After changing tacks several times, it is again saying it will boycott any run-off election.
Another incumbent fell by the wayside when Cynthia McKinney lost her primary run-off election.
If no such clear winner emerges on the first ballot, however, the two leading vote-getters will face a run-off election.
CNN: ASIANOW - TIME Asia | Indonesia: Taking It Right Down to the Wire
The Taliban called for a boycott Saturday of Afghanistan's upcoming presidential run-off election and repeated threats to disrupt the vote.
The MDC accused the security services of taking part in violent attacks on its supporters before June's presidential run-off election.
Mr Mousavi was hoping to prevent Mr Ahmadinejad winning more than 50% of the vote, in order to force a run-off election.
Mr Mwanawasa has been one of the strongest African critics of Zimbabwe, where President Robert Mugabe won a disputed run-off election last month.
In the capital, Kinshasa, where three days of fighting greeted the announcement, in August, of a run-off election, people are visibly on edge.
On November 26, a run-off election will take place in Ecuador that will determine who the next President of Ecuador is going to be.
The UN Security Council on Monday unanimously agreed to condemn the violence in Zimbabwe and said a free and fair run-off election would be "impossible".
Two Democratic candidates will face one another in a run-off election to succeed Antonio Villaraigosa as mayor of Los Angeles, after neither won a majority in Tuesday's vote.
BBC: Run-off election for Los Angeles mayor after split poll
The latest polls suggest no candidate will win more than 50% of the vote, in which case the top two will face a run-off election on 4 November.
But by falling short of an outright win, Mr Perez Molina seems set to face Manuel Baldizon, who garnered some 23%, in a run-off election on 6 November.
BBC: Guatemala set for run-off vote amid concerns over crime
The run-off election will be held on 21 May.
BBC: Run-off election for Los Angeles mayor after split poll
Former leftist guerrilla Jose Mujica took up office on 1 March 2010, after having won a run-off election against conservative former President Luis Lacalle in November 2009 with about 53% of the vote.
This week, a conversation with Senator Joe Lieberman, who's defending his seat against opponent Ned Lamont in Connecticut's Democratic Primary next Tuesday, a run-off election in Congress Woman's Cynthia McKinney's District also coming up.
In lieu of official results, ZESN released exit polling data that showed Tsvangirai leading with more than 49 percent of the vote -- short of the 50 percent plus one vote needed to avoid a run-off election.
In the run-up to the Haiti elections yesterday, the OAS played a pivotal role in ensuring a free, fair run-off election involving the candidates who actually got the most number of votes in the first round of the election.
The opposition, which says it is being targeted in attacks by government forces, claims that the weapons would have been used to intimidate voters in the event of a run-off election as Mugabe attempts to shore up his support.
That nation faces its first run-off presidential election ever.
American pressure has been stepped up in the days leading to the presidential-election run-off in Kabul on November 7th.
So when Wisconsin held its primary to choose the top two candidates for the requisite general election run-off, it was no surprise that Judge Prosser garnered 55% of the vote.
Mr Karzai was declared Afghan president after a second round election run-off was abandoned when his sole remaining challenger pulled out, saying the vote could not be free and fair.
In the 1996 Senate race, fear that he would make it to the run-off in a presidential-election year prompted state Republican leaders to step in and anoint their own candidate.
The re-appointment of Field Marshal Tantawi, head of the Supreme Council of the Armed Forces (Scaf), is in line with an interim constitutional declaration issued after June's presidential election run-off.
In the election run-off, he had the support of five candidates eliminated in the first round, as well as the backing of fellow musician Wyclef Jean, whose own candidacy was ruled invalid.
Only seven appeared to have won re-election without a run-off.
Michel Martelly, who first made his name on the Haitian music scene, was inaugurated as president in May 2011 after coming out of nowhere to win 68% of votes in the run-off of a hotly-contested presidential election in March.
Now it is taking its time to decide when a run-off, which should have taken place within three weeks of the first-round election, should be held.
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