Now only De Souza remained among the challengers.
The best showing among 12 challengers was under 13percentt.
The anti-Museveni vote is splintered among seven challengers, who cannot compete with the president financially.
It also pointed to the potential for a wave of mergers and acquisitions among the challengers.
Among the challengers is the fuchsia gall mite, a tiny eight-legged creature just a quarter of a millimetre long.
Center-left governments have lost power in Italy, Norway, Denmark and Portugal, and conservative candidates are among the challengers in Germany and the Netherlands.
Among the challengers who will try to put the heat on Weir is the 33-year-old Chopra.
Busch led for a race-high 86 laps and was among the challengers in the final laps.
Even so, the most intense rivalry among the challengers has its origins not on the water but in the marketplace.
"He was really good, and that's it," said Tsonga, 24, who along with Juan Mart del Potro, Rafael Nadal and Djokovic was among the challengers ready to unseat Federer.
