In theory, Mr Tsvangirai's bowing out of the race means another five-year term for Mr Mugabe.
He supported John Edwards until the former North Carolina senator dropped out of the race.
And now Tommy Thompson, the former governor of Wisconsin, has gotten out of the race.
Mr. KOHUT: I think reflecting the fact that Kucinich and Edwards dropped out of the race.
University of Louisville political scientist Laurie Rhodebeck said Judd certainly wasn't frightened out of the race.
Former Massachusetts Gov. Mitt Romney was third with 20 percent despite dropping out of the race.
Ms Scozzafava pulled out of the race and endorsed the Democrat, who went on to win.
Just as possible is a scandal forcing the presumptive nominee out of the race.
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Romney suggested Sunday that Huckabee get out of the race because he was splitting the conservative vote.
George McGovern -- who had supported Clinton -- called on her to drop out of the race.
One Edwards aide said he is not dropping out of the race because of his wife's health.
She suggested that Palin drop out of the race out of respect for the privacy of her family.
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Birch Bayh dropped out of the race for the Democratic nomination when his wife was stricken with cancer.
This week a crash knocked him out of the race with a concussion and a broken nose.
But a sizeable minority favour Thailand's Supachai Panitchpakdi, who is stubbornly refusing to pull out of the race.
The most dialogue-minded of them, Muhammad Khatami, a former reformist president, has just dropped out of the race.
Scott Brown called on Akin to drop out of the race because of the "outrageous, inappropriate and wrong" comments.
Two competitors were forced out of the race and after a protest the race was ordered to be re-run.
That doesn't mean that companies are dropping out of the race to embrace.
Tim Pawlenty, who dropped out of the race after gaining virtually no support.
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Despite rumors that Edwards would drop out of the race, or suspend his campaign, he announced he would continue.
Now with Clinton out of the race, Obama has been trying to win over some of her Hispanic supporters.
One of the things we missed most when I dropped out of the race was seeing David Bloom each day.
So when one of the titans quit the contest last Friday, all the gas went out of the race, right?
General Clark, who had earlier tried to pull rank on Lieutenant Kerry, dropped out of the race the next day.
The party's foreign affairs spokesman Menzies Campbell took the second largest amount of money before he dropped out of the race.
That certainly happened this year, with Biden, Brownback, Dodd bowing out of the race before the primary season really got underway.
Now he is out of the race, Mr Ahn has thrown his weight behind another independent, Park Won-soon, a social reformer.
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His rival may well put himself out of the race anyway, if he does not win well enough in Lower Saxony.
However, disaster struck on lap 26 when a brake failure forced the German's car onto the gravel and out of the race.
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